From severe storms to tornadoes, natural disaster statistics reveal that disasters are occurring more frequently and with greater intensity. Over the past five years, the U.S. has experienced an average of 18 billion-dollar climate disasters each year.

Add Yahoo as a preferred source to see more of our stories on Google. The severe thunderstorms on July 28 produced two damage-causing tornadoes in South Dakota, plus a third across the border in Iowa, according to the National Weather Service in Sioux Falls.

If a tornado is confirmed it will be given a rating on the Enhanced Fujita Scale, which runs from EF-0 to EF-5.

TANGIPAHOA PARISH, La. — Three tornadoes touched down in Tangipahoa Parish early Monday morning as strong storms moved through the area, the National Weather Service confirmed. A band of supercells trekked across the parish early Monday morning ...