Strong Hurricanes Getting Stronger; Warming Is Blamed

Global warming is causing powerful hurricanes to become even more intense, a new study says.

Warmer seawater has boosted the average wind speed of powerful hurricanes from 140 miles (225 kilometers) an hour in 1981 to 157 miles (253 kilometers) an hour in 2007, according to the study’s lead author, geographer James Elsner of Florida State University.

Hurricanes