Hurricanes have many names in English, depending on their geographical location. Storms that occur in the North Atlantic and Pacific Oceans are called "hurricanes", in the Northwest Pacific Ocean they are called "typhoons", and in the South Pacific and Indian Oceans they are called "cyclones".

Typhoons are divided into levels, depending on the strength of the winds. English uses the word "category" to refer to these levels: Saola is a Category 4 typhoon.

Thunderstorms are often accompanied by strong winds, thunder and lightning.

If you are struck by lightning, you can use the words "strike" or "hit": The old man was struck by lightning once. These two words are also used to say that an area is experiencing a storm: Typhoon Saola is about to hit Hong Kong on Friday.

There's a high chance of flash floods and landslides due to the incoming typhoon.

A storm is considered "severe" if it contains one or more elements such as a tornado, hail, or wind gusts.

A major storm that causes damage or loss of life may be classified as a natural disaster, called a "natural disaster" or "catastrophe". For example: The Katrina hurricane was one of the biggest catastrophes in the US history, causing more than a thousand deaths.

In many cases, the storm caused power outages or uprooted trees: A range of trees were uprooted after Typhoon Maon.

Eventually, a storm will often weaken into a tropical depression, called a "tropical depression": Some storms weakened and became a tropical depression before they hit Viet Nam.

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Khanh Linh