How the World Works

What is a Hurricane?

A hurricane is a tropical storm which usually forms out over the ocean. In the Indian Ocean they are known as cyclones and in the Pacific Ocean they are called typhoons. There is an 'eye' at the centre of the hurricane. In very big storms the winds can reach over 155 miles per hour (mph).

What causes a hurricane?

Hurricanes form out over the ocean when cold air and warm air collide. They are given a rating on the Saffir-Simpson scale. A rating of 1 has wind speeds of 75mph, but a 5 rating may have wind speeds of up to 155mph.