洪水。洪水是越南非常常见的一种自然灾害。越南漫长的海岸线和其人口密集、地势低洼的三角洲增加了该国应对洪水时的脆弱性。造成越南洪水的原因有很多。自然因素有季风季（5~10月）降雨，风暴和热带低气压。由于越南年平均降雨量在1500至2000毫米，因此大雨过后，经常会在一些排水系统较差的城市造成洪水。年度潮汐也是自然因素，尤其是在地球变暖的情况下，不断上升的海平面严重影响了长塔和长许等长三角地区的低地地区，使洪水持续时间变长。人为因素主要是指滥伐森林。森林有调节水源的作用，可以减少地表径流，将其转移到地下水和含水层中，而滥伐森林使得树木的水土保持功能下降，间接地使洪水更为严重。
干旱。每年11月到次年4月份，越南进入旱季。2016年，该国经历了90年罕见的干旱灾害，这场灾害被认为是由厄尔尼诺现象造成的。这一现象的主要特征是赤道太平洋的海洋温度异常温暖，从而影响沿海各国气候。2016年，越南63个省份中有52个受到旱灾的影响。在所有受灾人口中，50万人生活在受干旱影响的中南部和中部高原地区，150万人生活在湄公河三角洲地区。
火山喷发和地震。越南也发生过海底火山喷发事件和6.7级甚至更高级别的地震灾害，但由于远离城镇和工业中心，所以并没有对国家造成太大的威胁。
flood. Flood is a very common natural disaster in Vietnam. Vietnam's long coastline and its densely populated, low-lying delta increase the country's vulnerability to floods. There are many reasons for the floods in Vietnam. Natural factors include monsoon season (May to October) rainfall, storm and tropical depression. Since the average annual rainfall in Vietnam is 1500-2000mm, floods often occur in some cities with poor drainage system after heavy rain. Annual tides are also natural factors, especially in the case of global warming, the rising sea level has seriously affected the lowland areas of the Yangtze River Delta such as changta and Changxu, making The flood lasts longer. Human factors mainly refer to deforestation. Forests can regulate water sources, reduce surface runoff and transfer it to groundwater and aquifers. Deforestation reduces the function of soil and water conservation of trees and indirectly makes floods more serious.
Drought. Vietnam enters the dry season from November to April. In 2016, the country experienced a rare drought disaster in 90 years, which is considered to be caused by El Ni ñ o phenomenon. The main feature of this phenomenon is that the ocean temperature in the equatorial Pacific is unusually warm, which affects the climate of coastal countries. In 2016, 52 of Vietnam's 63 provinces were affected by drought. Of all the affected people, 500000 live in the drought affected central and southern highlands and 1.5 million in the Mekong Delta.
Volcanic eruptions and earthquakes. Vietnam has also experienced submarine volcanic eruptions and earthquakes with a magnitude of 6.7 or even higher, but it is far away from towns and industrial centers, so it does not pose a great threat to the country.
