Natural disaster
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BIU4词汇学案1.disaster n.灾难;灾害词块:an air disaster 空难;a natural disaster 自然灾害2.tornado n.(pl.oes oros)龙卷风;旋风拆分:撕裂(torn)ado(阿朵)房屋的是“龙卷风”(tornado)3.drought n.旱灾;久旱派生:dry v.(把...)弄干→drought n.旱灾;久旱词块: severe drought 严重旱灾ndslide n.(landfall)(山地或悬崖的)崩塌;滑坡合成: land(n.土地)+slide(v.滑动,滑落)→landslide n.5.slide vi. &vt.(slid,slid)(使)滑行;滑动对比: side n.一边,一侧词块:slide into a room 偷偷溜进房间;slide sth. into a drawer 把...偷偷塞进抽屉6.tsunami n.海啸词块:set off a tsunami 引发海啸7.flood n.洪水;大量vi.淹没;大量涌入vt.使灌满水;淹没对比:food,flood→食物在“洪水”过后被运往灾区搭配:v. flood in/into 大量涌入;flood out of 蜂拥而出;be flooded with 被挤满...8.volcanic eruption火山喷发9.magnitude n.(地)震级;重大10.rescue n.&vt.营救;救援搭配:v. rescue sb.from... 从...营救n. e to one’s rescue 援救某人; rescue workers救援人员11.damage vt.损害;破坏n.损坏;损失联想:大(da)+妈(ma)+歌(ge)→大妈的歌具有破坏力搭配:n. do /cause damage to 对...造成损害12.destroy vt.摧毁;毁灭派:destruction n.毁坏;destructive adj.具有破坏力的13.e vacu ate vt.疏散;撤出vi.撤离词源e向外空(动词后缀)→evacuate 疏散;撤离14.helicopter n.直升机词块:~ parents 直升机式父母归类jet喷气式飞机→fighter战斗机→bomber轰炸机→helicopter直升机15.death n.死;死亡派生:dead adj.死的,去世的→death n.死;死亡th 名词后缀:状态;die v.死词块:be frightened/scared to death吓死;be bored to death 无聊死16.affect vt.影响:(疾病)侵袭;深深打动搭配:affect sth 影响...;be affected by/ be influenced by 被...影响易混:effect n.影响have a great effect on sth 对...产生影响;e into effect 生效17.shelter n.避难处;居所;庇护vt.保护;掩蔽vi.躲避(风雨或危险)拆分:她she+lt(“”拼音首字母)+er(“儿”)→她带着和儿子躲在“避难处”搭配:n. under the shelter of ...在...的庇护下;v. shelter sb./sth (from sb./sth.) 庇护...18.crack n.裂纹;裂缝vi.&vt.(使)破裂19.as if似乎;好像;仿佛语境:She looks as if she were ten years younger.她看起来好像年轻了十岁。
“natural disasters”的意思是“自然灾害”。
在高中英语中,可能会涉及到以下相关内容:
- **词汇**:学习与自然灾害相关的词汇,如earthquake(地震)、flood (洪水)、typhoon(台风)、hurricane(飓风)、tsunami(海啸)、drought(干旱)、wildfire(野火)等。
- **阅读和听力材料**:可能会阅读或听取关于自然灾害的文章、新闻报道或故事,了解自然灾害的原因、影响和应对措施。
- **写作和口语表达**:学生可能需要写关于自然灾害的短文、议论文或进行口语讨论,表达自己对自然灾害的看法、如何预防和应对等。
- **语法和句型**:学习描述自然灾害的时态、语态和句型,如现在完成时、被动语态等。
- **科普知识**:了解自然灾害的形成机制、预警系统、救援工作等科学知识。
- **环境保护意识**:通过对自然灾害的学习,培养对环境保护的意识,探讨人类活动与自然灾害的关系。
《Natural disasters》说课稿尊敬的各位评委、老师:大家好!今天我说课的内容是《Natural disasters》。
下面我将从教材分析、学情分析、教学目标、教学重难点、教学方法、教学过程以及教学反思这几个方面来展开我的说课。
一、教材分析《Natural disasters》这一主题通常出现在英语教材中的科普类或社会类单元中。
它涵盖了地震、洪水、飓风、火山喷发等多种常见的自然灾害类型,不仅能够帮助学生扩充词汇量,还能让学生了解自然灾害的特点、危害以及应对措施,培养学生的环保意识和应对危机的能力。
从教材的编排来看,通常会通过阅读、听力、写作等多种形式来呈现这一主题。
阅读材料可能会包括有关自然灾害的新闻报道、科普文章等;听力部分可能会有关于灾害经历的讲述或者灾害预警的信息;写作部分则可能要求学生描述一种自然灾害或者提出应对灾害的建议。
二、学情分析本次授课的对象是具体年级的学生。
他们已经具备了一定的英语基础,掌握了一定的词汇和语法知识,能够进行简单的英语交流和书面表达。
然而,对于自然灾害这一较为复杂和严肃的主题,学生可能在词汇量和背景知识方面存在不足,需要在教学过程中进行补充和强化。
此外,这个年龄段的学生好奇心强,喜欢探索新鲜事物,但他们的注意力集中时间相对较短,需要通过多样化的教学方法和生动有趣的教学活动来激发他们的学习兴趣,保持他们的学习积极性。
三、教学目标基于对教材和学情的分析,我制定了以下教学目标:1、知识目标(1)学生能够掌握与自然灾害相关的常见词汇,如 earthquake, flood, hurricane, volcano 等。
(2)学生能够理解并运用描述自然灾害的句型,如“An earthquake happened in” “The flood caused a lot of damage” 等。
2、技能目标(1)通过阅读和听力练习,提高学生获取信息和理解大意的能力。
必修一Unit4 Natural DisastersDisaster: Usage: A disaster refers to a sudden and severe event causing great damage, destruction, or loss of life. Example: The earthquake that hit the city was a major disaster, leaving thousands homeless and causing widespread devastation.Tornado: Usage: A tornado is a violent, rotating column of air that extends from a thunderstorm to the ground. Example: The tornado tore through the small town, uprooting trees and destroying several houses.Drought: Usage: A drought is a prolonged period of abnormally low rainfall, leading to a water shortage in a region. Example: The ongoing drought has resulted in water rationing and a decline in agricultural production.Landslide: Usage: A landslide occurs when a mass of earth or rock slides down a slope, often triggered by heavy rainfall or earthquakes. Example: The heavy rains caused a landslide, blocking the road and isolating the mountain village.Tsunami: Usage: A tsunami is a series of large ocean waves usually caused by an undersea earthquake or volcanic eruption. Example: The tsunami waves crashed into the coastal town, causing significant destruction and loss of life.Flood: Usage: A flood is an overflow of water onto land that is usually dry. Example: The river overflowed its banks, leading to widespread flooding in the surrounding areas.Volcanic Eruption: Usage: A volcanic eruption is the release of magma, ash, and gases from a volcano. Example: The volcanic eruption spewed ash into the atmosphere, affecting air travel in the region.Magnitude: Usage: Magnitude refers to the size, extent, or importance of something, often used to describe the intensity of earthquakes. Example: The earthquake measured 7.5 on the Richter scale, indicating a significant magnitude.Rescue: Usage: Rescue involves saving someone from a dangerous or distressing situation. Example: The search and rescue team worked tirelessly to find survivors trapped under the collapsed building.Damage: Usage: Damage refers to harm or injury caused by an event or action. Example: The storm caused extensive damage to the infrastructure, leaving many without electricity.Destroy: Usage: Destroy means to completely ruin or damage something beyond repair. Example: The fire destroyed the historic building, reducing it to ashes.Evacuate: Usage: Evacuate means to move people away from a dangerous area to a safer place. Example: The authorities ordered residents to evacuate as the floodwaters continued to rise.Helicopter: Usage: A helicopter is a type of aircraft that can take off and land vertically and is often used for transportation or rescue operations. Example: The injured hiker was airlifted to safety by a helicopter.Death: Usage: Death refers to the end of life or the state of being deceased. Example: The earthquake resulted in several deaths and many injuries.Affect: Usage: Affect means to produce a change or influence something. Example: The economic crisis affected businesses and led to job losses.Shelter: Usage: Shelter is a place that provides protection and safety, especially during emergencies or disasters. Example: The relief organization set up temporary shelters for the displaced families.Crack: Usage: A crack is a narrow opening or fracture, often found in surfaces like walls or rocks. Example: The earthquake caused cracks to appear in the walls of many buildings.Gas: Usage: Gas refers to a substance in a state that is neither solid nor liquid, such as oxygen or carbon dioxide. Example: The leak of a toxic gas from the factory caused several people to fall sick.As if: Usage: "As if" is a phrase used to compare something or express a resemblance. Example: The wind howled outside as if a storm was approaching.Ruin: Usage: Ruin refers to the state of being destroyed or severely damaged. Example: The abandoned castle was in a state of ruin, with only its walls standing.In ruins: Usage: "In ruins" means something has been completely destroyed or fallen into a state of decay. Example: After the earthquake, the once-thriving city lay in ruins.Percent: Usage: Percent is a unit of measurement representing a portion out of 100. Example: Fifty percent of the population voted in favor of the new law.Brick: Usage: A brick is a rectangular block made of clay or other materials, used for building walls or structures. Example: The old house was constructed using red bricks.Metal: Usage: Metal refers to a solid material that is typically hard, shiny, and has good electrical conductivity. Example: The roof of the building was made of corrugated metal sheets.Shock: Usage: Shock is a strong emotional or physical reaction to a sudden, unexpected event. Example: The news of the accident left everyone in shock.In shock: Usage: "In shock" means being in a state of extreme surprise, disbelief, or emotional numbness. Example: She was in shock after hearing about her friend's sudden death.Electricity: Usage: Electricity is a form of energy produced by the movement of electrons, commonly used for powering devices and lighting. Example: The power outage left the entire neighborhood without electricity.Trap: Usage: To trap means to catch or confine something or someone in a confined space. Example: The hikers were trapped in the cave due to a rockfall.Bury: Usage: To bury means to put something or someone in the ground and cover it with soil. Example: The archaeologists uncovered ancient artifacts buried deep in the earth.Breathe: Usage: To breathe means to inhale and exhale air, necessary for sustaining life. Example: The fresh mountain air made it easier to breathe.Revive: Usage: To revive means to bring back to life or consciousness. Example: The lifeguard performed CPR to revive the drowning swimmer.Revival: Usage: Revival refers to the act of bringing something back to life or popularity. Example: The classic play received a revival on Broadway, attracting a new audience.Effort: Usage: Effort is the exertion of physical or mental energy to accomplish something. Example: With great effort, they managed to complete the challenging task.Unify: Usage: To unify means to bring together or combine to form a single unit or entity. Example: The treaty aimed to unify the two neighboring countries.Wisdom: Usage: Wisdom refers to the ability to apply knowledge and experience to make sound judgments and decisions. Example: The elder shared her wisdom with the younger members of the community.Context: Usage: Context is the circumstances or information that surround a particular event or situation and give it meaning. Example: Without proper context, the statement can be easily misunderstood.Suffer: Usage: To suffer means to experience pain, distress, or hardship. Example: The victims of the natural disaster suffered immense losses.Volcano:Usage:A volcano is a geological formation that results from the eruption of molten rock (magma) onto the Earth's surface. It can also refer to the vent or opening through which this magma, volcanic ash, and gases are expelled. Example: Volcanoes can have a significant impact on the environment and surrounding communities.Erupt: Usage: Erupt" is a verb that means to burst forth or release suddenly, often with great force or violence. It is commonly used to describe volcanic activity when a volcano releases magma, ash, and gases onto the Earth's surface. Example : The volcano erupted, sending a plume of ash and smoke high into the sky.Supply: Usage: Supply refers to the quantity of something available for use or distribution. Example: The stores quickly ran out of supplies during the hurricane preparation.Typhoon: Usage: A typhoon is a tropical cyclone that occurs in the Pacific region. Example: The typhoon caused widespread destruction and flooding in the coastal areas.Hurricane: Usage: A hurricane is a powerful tropical cyclone that forms in the Atlantic or eastern Pacific Ocean. Example: The hurricane's strong winds uprooted trees and damaged buildings.Survive: Usage: To survive means to continue to live or exist despite difficult circumstances. Example: With proper medical care, the patient managed to survive the life-threatening illness.Power: Usage: Power refers to the ability to control or influence others or the environment. Example: The strong winds knocked down power lines, causing a blackout.Tap: Usage: To tap means to lightly touch or strike something. Example: She tapped on the window to get her friend's attention.Pipe: Usage: A pipe is a long, tube-like structure used to convey liquids or gases. Example: The burst pipe flooded the basement of the house.Whistle: Usage: To whistle means to make a high-pitched sound by blowing air through pursed lips. Example: The coach used a whistle to signal the start of the game.Emergency: Usage: An emergency is a situation that requires immediate action to prevent harm or damage. Example: The hospital was well-prepared to handle the influx of patients during theemergency.Calm: Usage: Calm refers to a state of tranquility or lack of agitation. Example: After the storm passed, the sea returned to a calm state.Aid: Usage:Aid is a noun that refers to assistance, support, or help provided to someone in need, especially during difficult or challenging circumstances. It can also be used as a verb, "to aid," which means to provide assistance or support. Example: The humanitarian organization provided food, medical aid, and shelter to the victims of the natural disaster.Kit: Usage: Kit" is a noun that refers to a set of tools, equipment, or items assembled together for a specific purpose or activity. It is often used to describe a collection of items that are needed or useful for a particular task or situation. Example: The first-aid kit in the office contained bandages, antiseptic wipes, and pain relievers.On hand: Usage: On hand is a phrase that means having something readily available or easily accessible at the current moment. It implies that the item or resource is within reach and can be used or accessed without delay. Example: The firefighters always keep first-aid supplies on hand in case of emergencies.Crash: Usage: A crash refers to a violent collision or impact. Example: The two cars collided, resulting in a severe crash.Sweep: Usage: To sweep means to clean or move away debris or dirt with a broom or a similar tool. Example: He swept the fallen leaves off the driveway.Sweep away: Usage: To sweep away means to remove or carry away something quickly and forcefully. Example: The floodwaters swept away everything in their path.Wave: Usage: A wave is a moving ridge or swell on the surface of water. Example: The surfer rode the wave all the way to the shore.Strike: Usage: To strike means to hit or deliver a blow. Example: The lightning strike hit the tree, causing it to catch fire.Deliver: Usage: To deliver means to transport or bring something to a specific location. Example: The courier will deliver the package to your doorstep.Summary: Usage: A summary is a concise and condensed version of information or a story. Example: The professor provided a summary of the key points at the end of the lecture.Effect: Usage: Effect refers to the result or consequence of a particular action or event. Example: The new policy had a positive effect on the company's profits.Length: Usage: Length refers to the measurement of something from one end to the other. Example: The length of the river is approximately 500 kilometers.。
natural disasters 高中英语全文共四篇示例,供读者参考第一篇示例:自然灾害是指由于自然原因而造成的突发性灾害事件,如地震、火山喷发、飓风、龙卷风、洪水、干旱等。
这些灾害往往带来毁灭性的影响,给人类的生命和财产安全带来严重威胁。
自然灾害是地球的一部分,人类需要与之共存,因此了解自然灾害并做好应对措施是至关重要的。
地震是一种常见的自然灾害。
地震是由地壳板块构造运动引起的地球内部能量释放而产生的地震波,会引起地面震动、地表沉陷、土石流等现象,造成巨大的破坏。
地震常发生在地震带,如太平洋火山带、喜马拉雅地震带等。
为了减少地震带来的伤害,我们可以通过建筑加固、地震避难演练等方式来预防和减少地震造成的伤害。
火山喷发是另一种常见的自然灾害。
火山是地壳中的熔岩通过火山口喷出,形成的地质现象。
火山喷发会释放出高温的熔岩、岩浆和火山灰等物质,对周围的生物和人类造成极大的危害。
火山喷发往往伴随着地震、烟尘、火山弹等现象,对周围环境造成污染和破坏。
为了减少火山喷发带来的危害,我们可以通过监测火山活动、规划疏散路线等方式来降低人员伤亡和财产损失。
飓风和龙卷风是造成重大破坏的极端天气现象。
飓风是海洋上的气旋风暴,具有强烈的对流旋风,风速可达每小时200公里以上,对沿海地区和海岸线造成严重影响。
龙卷风是强烈的环流气流和气旋风暴,通常伴随着旋转的漏斗云,具有短暂但强烈的破坏力。
为了减少飓风和龙卷风的影响,我们可以通过气象预警系统、加固建筑、房屋保险等方式来减少人员伤亡和财产损失。
洪水是由于降水过多或江河水位上涨而导致的大面积水灾事件。
洪水往往会造成河流溢出、农田被淹、城市停电等后果,对周围的生活和经济造成严重破坏。
为了减少洪水的危害,我们可以通过加强防洪堤坝建设、疏浚排水渠、定期清理下水道等方式来减少洪水灾害的发生和扩大。
干旱是由于长时间缺乏降水而导致的干旱现象,对农业、生态系统和人类生活造成严重危害。
干旱会造成农作物减产、土地荒漠化、水资源供应不足等影响,给社会和经济带来严重困扰。
Unit4 Natural disasters核心考点归纳【重点单词】1. rescue n.& vt. 营救;救援(教材P48)(1)come/go to sb.'s rescue 来/去救助某人rescue team/workers 救援队/人员(2)rescue ... from ... 把……从……解救出来①When we were in danger, they came_to_our_rescue.当我们有危险时,他们赶来救援我们。
②Hundreds of miners are still in water, waiting to be_rescued.数以百计的矿工仍在水中等待救援。
③The brave firefighter rescued_three_children_from the burning house yesterday.昨天这名勇敢的消防队员从燃烧的房子中救出了三个孩子。
2. damage vt. 损害;破坏n. 损坏;损失(教材P48)(1)damage one's health 损害某人的健康(2)cause/do damage to ... 对……造成损害①Several vehicles were_damaged in the crash.好几辆汽车在撞车事故中损坏了。
②This could cause_serious_damage_to the country's economy.这可能对国家的经济造成严重破坏。
③As we all know, smoking can damage_our_health. We'd better give it up.众所周知,吸烟会损害健康,我们最好戒烟。
3. affect vt. 影响;(疾病)侵袭;深深打动(教材P49)(1)be greatly/deeply affected by 被……深深打动;被……深深影响be affected with high fever 发高烧affect sb. to tears 把某人感动得流泪①With the government's aid, those people affected_by the earthquake have moved into the new settlements.在政府的援助下,那些受地震灾害影响的人们已经搬进了新居。
高中英语阅读课《Natural Disaster》试讲稿1.Lead-in: BrainstormClass begins. Good morning, boys and girls. Today we will learn a new unit together.First let’s get to know the man, who is called Mr. Nature. He is very emotional. When he is happy, he stays calm and shows us beautiful natural scenery. But when he gets angry, he becomes a troublemaker and causes many natural disasters. Do you know the meaning of natural disaster? Yes, it means “自然灾害”, for example, the earthquake happened in Ya’an last month, which caused great damage. Besides earthquake, what other kinds of natural disasters do you know? Please brainstorm and try to think of as many natural disasters as you can. Suggested answers:Guys, you’ve done a great job. Have you experienced any natural disaster we mentioned just now? You please.Suggested answers: You have experienced flood in summer. What did you see? The flood water covered the whole city and you had to stay at home. Can you describe your feelings at that time? You felt frightened and nervous.2. Pre-readingYes, I totally agree with you. In most cases, natural disasters can be very frightening. Today we will read a passage about natural disasters. Please take out your handout and listen to the tape. After listening, please tell me the main idea of this passage and in what order this passage is organized. You only have 2 minutes. Ready? Go!Time is up. Who would like to tell us the main idea? Tom, would you please have a try?Very good. Can you tell me in what order this passage is developed?In order of time.How do you know that? Because the writer first describes strange things in the first part and then tells us the city was destroyed by the earthquake. Lastly, he says the army came after earthquake. Yes, you are right.3. While-readingIn the first part, the writer tells us strange things happened before the earthquake. We know that before some natural disaster, there are sometimes warning signs from nature. If we have such kind of knowledge, we can reduce the damage. Please go through the first paragraph quickly and try to figure out what signs did the author mention? You only have one minute. Here we go!Now let’s read for more details. Let’s go thro ugh the whole passage and try to find the answers to the following three questions.Read the text quickly and try to finish the following exercises.A. New words or phrases4. Post-reading1.DiscussionSuppose an earthquake happens now, what should we do to keep ourselves safe?Please discuss natural wonders in groups and your discussion should be based on the two questions. This time, the group leader should take down your group members’ ideas and sum them up in your own words. Later, we will share your ideas with all of us here. Understand?Time is up. Any group would like to share your idea with us? Suggested answers:2. InterviewHave you noticed that news reporters and interviewers play an important role in keep us informed after Ya’an earthquake happened? Next, please choose a paragraph and act out an interview between a reporter and survivor from the Tangshan earthquake. Make a dialogue with your partner. I will give you three minutes and then I will invite some of you to act it out.5. Summary and assignmentWe have done a lot of things today. Firstly, we have talked about…. Then, we discussed. Next, we learned some useful words and expressions.Here comes your assignment:1.Retell the passage.2.Search the Internet to find more information about earthquake. Class is over. See you next time!。
Natural disasterA natural disaster is the consequence of a natural hazard (e.g. volcanic eruption, earthquake, or landslide) which affects human activities. Human vulnerability, exacerbated by the lack of planning or appropriate emergency management, leads to financial, environmental or human losses. The resulting loss depends on the capacity of the population to support or resist the disaster, their resilience.[1] This understanding is concentrated in the formulation: "disasters occur when hazards meet vulnerability".[2] A natural hazard will hence never result in a natural disaster in areas without vulnerability, e.g. strong earthquakes in uninhabited areas. The term natural has consequently been disputed because the events simply are not hazards or disasters without human involvement.[3]Natural hazardsA natural hazard is a threat of an event that will have a negative effect on people or the environment. Many natural hazards are related, e.g. earthquakes can result in tsunamis, drought can lead directly to famine and disease. A concrete example of the division between hazard and disaster is that the 1906 San Francisco earthquake was a disaster, whereas earthquakes are a hazard. Hazards are consequently relating to a future occurrence and disasters to past or current occurrences.Natural disastersLand movement disastersAvalanchesAvalanche on the backside (East) of Mt. Timpanogos, Utah at Aspen Grove trailNotable avalanches include:∙The 1910 Wellington avalanche∙The 1954 Blons avalanches∙The 1970 Ancash earthquake∙The 2019 Galtür Avalanche∙The 2019 Kolka-Karmadon rock ice slideEarthquakesEarthquakes by themselves rarely kill people or wildlife. It is usually the secondary events that they trigger, such as building collapse, fires, tsunamis and volcanoes, that are actually the human disaster. As many of these could be avoided by better construction, safety systems, early warning and evacuation planning, the term unnatural disaster is not unwarranted.Some of the most significant earthquakes in recent times include: ∙The 2004 Indian Ocean earthquake, the second largest earthquake inrecorded history, registering a moment magnitude of 9.3. The huge tsunamis triggered by this earthquake cost the lives of at least 229,000 people.∙The 7.6-7.7 2005 Kashmir earthquake, which cost 79,000 lives in Pakistan.∙The 7.7 magnitude July 2006 Java earthquake, which also triggered tsunamis.A Sumatran village, devastated by the tsunami that followed the 2004 Indian Ocean earthquake∙The 7.9 magnitude May 12, 2008 Sichuan earthquake in Sichuan Province, China. Death toll at over 61,150 as of May 27, 2019. LaharsThe Tangiwai disaster is an excellent example of a lahar, as is the one which killed an estimated 23,000 people in Armero, Colombia, during the 1985 eruption of Nevado del Ruiz.Landslides and MudflowsThese occur with some regularity in parts of California after periods of heavy rain.Volcanic eruptionsPu'u 'Ō'ō∙An Eruption may in itself be a disaster, due to the explosion of the volcano or the fall of rock, but there are several effects that may happen after an eruption that are also hazardous to human life.∙Lava may be produced during the eruption of a volcano, a material consisting of superheated rock. There are several different forms, which may be either crumbly (like a`a) or gluey (like pahoehoe).Leaving the volcano, this destroys any buildings and plants itencounters.∙Volcanic ash - generally meaning the cooled ash - may form a cloud, and settle thickly in nearby locations. When mixed with water, this forms a concrete-like material. In sufficient quantity, ash maycause roofs to collapse under its weight, but even small quantities will cause ill-health if inhaled. Since the ash has the consistency of ground glass, it causes abrasion damage to moving parts, such as engines.∙Supervolcanos : According to the Toba catastrophe theory, 70 to75 thousand years ago, a super volcanic event at Lake Toba reducedthe human population to 10,000 or even 1,000 breeding pairs,creating a bottleneck in human evolution. The main danger from a supervolcano is the immense cloud of ash, which has a disastrous global effect on climate and temperature for many years.∙Pyroclastic flows consist of a cloud of hot volcanic ash which builds up in the air above a volcano, until it collapses under its own weight, and streams very rapidly from the mountain, burninganything in its path. It is believed that Pompeii was destroyed bya pyroclastic flow.∙Lahars, mentioned above, may be triggered by volcanic eruptions. Water disastersFloodsThe Limpopo River, in southern Mozambique, during the 2000 Mozambique floodSome of the most notable floods include:∙The Huang He (Yellow River) in China floods particularly often. The Great Flood of 1931 caused between 800,000 and 4,000,000 deaths.∙The Great Flood of 1993 was one of the most costly floods in United States history.∙The 1998 Yangtze River Floods, also in China, left 14 million people homeless.∙The 2000 Mozambique flood covered much of the country for three weeks, resulting in thousands of deaths, and leaving the country devastated for years afterward.Tropical cyclones can result in extensive flooding and storm surge, as happened with:∙Bhola Cyclone, striking East Pakistan (now Bangladesh) in 1970, ∙Typhoon Nina, striking China in 1975,∙Tropical Storm Allison, which struck Houston, Texas in 2019 and ∙Hurricane Katrina, which left most of New Orleans under water in 2019. Much of the flooding was due to the failure of the city's levee system.Limnic eruptionsA cow suffocated by gases from Lake Nyos after a limnic eruptionsuddenly erupts from deep lake water, A limnic eruption occurs when CO2posing the threat of suffocating wildlife, livestock and humans. Such andisplaces eruption may also cause tsunamis in the lake as the rising CO2water. Scientists believe landslides, volcanic activity, or explosions can trigger such an eruption.To date, only two limnic eruptions have been observed and recorded:∙In 1984, in Cameroon, a limnic eruption in Lake Monoun caused the deaths of 37 nearby residents∙At nearby Lake Nyos in 1986 a much larger eruption killed between 1,700 and 1,800 people by asphyxiation.TsunamisThe tsunami caused by the December 26, 2004 earthquake strikes Ao Nang, Thailand.Tsunami can be caused by undersea earthquakes as the one caused in Ao Nang, Thailand by the 2004 Indian Ocean Earthquake, or by landslides such as the one which occurred at Lituya Bay, Alaska in.∙Ao Nang, Thailand (2019). The 2004 Indian Ocean Earthquake created the tsunami and disaster at this site.∙Lituya Bay, Alaska (1953). See paragraph three (3) of the entry.A mega-tsunami occurred here, the largest ever recorded.This would also fit within Land movement category because it starts with an earthquake.Weather disastersYoung steer after a blizzard, March 1966BlizzardsSignificant blizzards in the United States include:∙The Great Blizzard of 1888∙The Schoolhouse Blizzard earlier the same year∙The Armistice Day Blizzard in 1940∙The Storm of the Century in 1993DroughtsWell-known historical droughts include:∙1900 India, killing between 250,000 and 3.25 million.∙1921-22, Soviet Union, in which over 5 million perished from starvation due to drought.[4]∙1928-30, northwest China, resulting in over 3 million deaths by famine.∙1936 and 1941, Sichuan Province, China, resulting in 5 million and2.5 million deaths respectively.∙As of 2019, Western Australia, New South Wales, Victoria and Queensland (states of Australia) have been under drought conditions for five to ten years. The drought is beginning to affect urban populations for the first time.∙In 2019, Sichuan Province, China experienced its worst drought in modern times, with nearly 8 million people and over 7 million cattle facing water shortages.HailstormsA particularly damaging hailstorm hit Munich, Germany on August 31, 1986, felling thousands of trees and causing millions of dollars in insurance claims.Heat wavesThe worst heat wave in recent history was the European Heat Wave of 2003.Hurricane KatrinaCyclonic stormsHurricane, tropical cyclone, and typhoon' are different names for the same phenomenon: a cyclonic storm system that forms over the oceans. The deadliest hurricane ever was the 1970 Bhola cyclone; the deadliest Atlantic hurricane was the Great Hurricane of 1780, which devastated Martinique, St. Eustatius and Barbados. Another notable hurricane is Hurricane Katrina, which devastated the Gulf Coast of the United States in 2019.FireWildfires are an uncontrolled fire burning in wildland areas. Common causes include lightning and drought but wildfires may also be started by human negligence or arson. They can be a threat to those in rural areas and also wildlife.Health and diseaseEpidemicThe A H5N1 virus, which causes Avian influenzaAn epidemic is an outbreak of a contractible disease that spreads at a rapid rate through a human population. A pandemic is an epidemic whose spread is global. There have been many epidemics throughout history, such as Black Death. In the last hundred years, significant pandemics include:∙The 1918 Spanish flu pandemic, killing an estimated 50 million people worldwide∙The 1957-58 Asian flu pandemic, which killed an estimated 1 million people∙The 1968-69 Hong Kong flu pandemic∙The 2019-3 SARS pandemic∙The AIDS epidemic, beginning in 1959Other diseases that spread more slowly, but are still considered to be global health emergencies by the WHO include:∙XDR TB, a strain of tuberculosis that is extensively resistant to drug treatments∙Malaria, which kills an estimated 1.5 million people each year ∙Ebola hemorrhagic fever, which has claimed hundreds of victims in Africa in several outbreaksFamineIn modern times, famine has hit Sub-Saharan Africa the hardest, although the number of victims of modern famines is much smaller than the number of people killed by the Asian famines of the 20th century.SpaceFallen trees caused by the Tunguska meteoroid of the Tunguska event in June, 1908.Impact eventsOne of the largest impact events in modern times was the Tunguska event in June, 1908.Solar flareA solar flare is a phenomenon where the sun suddenly releases a great amount of solar radiation, much more than normal. Some known solar flares include:∙An X20 event on August 16, 1989∙ A similar flare on April 2, 2001∙The most powerful flare ever recorded, on November 4, 2003, estimated at between X40 and X45∙The most powerful flare in the past 500 years is believed to have occurred in September 1859∙。