Forest officials closed the San Juan National Forest in southwest Colorado because of "historic levels" of fire danger. The closure will affect local tourism economies.
The EPA intends to block rules to prevent and respond to leaks, explosions and other disasters at chemical facilities and refineries around the U.S. That scares many people who live and work nearby.
After decades of modern fire prevention some forests are much thicker than they've been historically. New research offers a guide to thinning that could keep wildfires smaller and shorter.
Forecasters have gotten better giving advance notice of when tornadoes might strike. Now, there's a new technology that may help researchers even more: listening for the sounds of a tornado that humans can't hear.