The "Dust Bowl" is a phrase used to describe prairie regions of the United States and Canada in the 1930s. The Dust Bowl spread from Saskatchewan and Manitoba to the north, all the way to Oklahoma and parts of Texas and New Mexico in the south. In these areas, there were many serious dust storms and droughts during the 1930s. These caused major damage to the Dust Bowl areas' economies, ecology, and agriculture. The dust bowl was the worst man made disaster in U.S history. It was many dust storms that happened for many years.