Study Attributes Stronger Storms to Warmer Seas

By THE ASSOCIATED PRESS

Published: September 16, 2005

WASHINGTON, Sept. 15 (AP) - Storms with the power of Hurricane Katrina are becoming more common, in part because of global warming, according to a report from a team of researchers that will be published Friday.

The number of storms in the two most powerful categories, 4 and 5, rose to an average of 18 a year worldwide since 1990, up from 11 in the 1970's, according to the report, which will be published in the journal Science.