Katrina and Rita seem to be threatening to break all records for a single hurricane season. A recent study says stronger storms — Category 3, 4 and 5 hurricanes — are becoming more frequent, though not all scientists agree.
Kerry Emanuel, author Divine Wind: The History and Science of Hurricanes; professor, Department of Earth, Atmospheric and Planetary Sciences, MIT.
Gerry Bell, lead forecaster for NOAA's seasonal hurricane outlook. Climate Prediction Center, National Weather Service.
Judy Curry, chairwoman, School of Earth & Atmospheric Sciences, Georgia Tech.