Flood: Become covered wuth water 洪水
Floods are among the most frequent and costly natural disasters.
Drought： An extended period of time with little or no rainfall 干旱，旱灾
The following topics provide background on some of the scientific issues regarding droughts.
Hurricane： a severe storm originating in the North Atlantic Ocean or Northeast Pacific with very strong winds and heavy rain. 飓风（产生在大西洋和东北太平洋沿岸国家（加拿大、美国等）
Hurricanes are among nature's most powerful and destructive phenomena.
Dust Storm： a storm with very strong winds that blow a lot of dry soil around. 沙尘暴
Drivers should proceed slowly to the nearest exit and leave the highway until the dust storm subsides.
Tornado：a very strong wind that goes round in a circle of funnel. 龙卷风（多发生在美国）
During a tornado, people face hazards from extremely high winds and risk being struck by flying and falling objects.
Cyclone： a severe storm originating in the Northwest Pacific Ocean with heavy rain and strong winds that blow in a circle.气旋（多产生在南太平洋或者是印度洋）
The main parts of a tropical cyclone are the rainbands, the eye, and the eyewall.
Heatwave: a continuous period of exceptionally hot weather.热浪
Europe's heatwave sends temperature records tumbling.