Blogs States of Change
The location, duration and severity of U.S. heat waves all contribute to how deadly a streak of hot temperatures will be.
October 2010 was the 11th warmest such month on record in the U.S., and it was marked by a rare, potent storm system.
In an Oregon Mountain region, a change in plant populations marks the warming of local temperatures.
Experts met in Montana earlier this month to explore thorny ethical questions surrounding geoengineering, or deliberately cooling the planet to counteract global warming.