Storm Damage? Don't Quickly Blame Global Warming

"If climate change is having an effect on the intensities of storms, it's not obvious in the historical weather data. And whatever effect it is having is much, much smaller than the effect of development along the coastlines. In fact, if you look at all storms from 1900 to 2005 and imagine we had today's populations on the coasts, as Roger Pielke, Jr., and his colleagues did in a 2008 Natural Hazards Review paper, you would see that the worst hurricane would have actually happened in 1926.

"If it happened today, the Great Miami storm would have caused $140 to $157 billion in damages. (Hurricane Katrina, the costliest storm in U.S. history, caused $100 billion in losses.) "There has been no trend in the number or intensity of storms at landfall since 1900,"says Pielke, a professor of environmental studies at the University of Colorado. "The storms themselves haven't changed."

"What's changed is what we've put in the storm's way. Crowding together in coastal cities puts us at risk on a few levels. First, it is harder for us to evacuate before a storm because of gridlock. And in much of the developing world, people don't get the kinds of early warnings that Americans get. So large migrant populations - usually living in flimsy housing - get flooded out year after year. That helps explain why Asia has repeatedly been the hardest hit by disasters in recent years.

"Secondly, even if we get all the humans to safety, we still have more stuff in harm's way. So each big hurricane costs more than the big one before it, even controlling for inflation.

You can read the full article here.