"A record drought in northern Mexico has prompted warnings that the region's climate may have changed for good."

"COLUMBUS, Ohio -- A freight train derailment and explosion in Columbus, Ohio, has authorities evacuating a mile-wide area of the city as they try to contain the blaze and determine what's burning."

"Two years ago this month, an oil pipeline burst in Michigan, contaminating 38 miles of the Kalamazoo River. It didn't get much national notice because everyone was focused on the massive BP oil spill in the Gulf of Mexico."

"Some of the weather extremes bedeviling people around the world have become far more likely because of human-induced global warming, researchers reported on Tuesday. Yet they ruled it out as a cause of last year’s devastating floods in Thailand, one of the most striking weather events of recent years."

"The worst wildfire season in decades is not only blackening tens of thousands of acres in Western states; it is also creating significant environmental damage."

"A coalition of about a dozen environmental groups is preparing to file a lawsuit as early as Tuesday seeking greater protections as Shell prepares to begin drilling exploratory wells off the North Slope of Alaska this summer, spokesmen for the groups said."

"KANSAS CITY, Mo. — An unrelenting and record-setting heat wave peaked this weekend, beating a broad swath of states into sweaty submission, with above-normal triple-digit temperatures stretching from St. Louis to Washington."

"In Texas, there is still the drought against which all other droughts are measured: the seven-year dry spell in the 1950s. It was so devastating that agriculture losses exceeded those of the Dust Bowl years, and so momentous that it kicked off the modern era of water planning in Texas."

"It took Gulf Coast lawmakers more than two years of prodding and negotiating to persuade a divided Congress their communities deserve most of the billions of dollars BP will pay in fines for its role in the 2010 oil spill. Now comes another challenge: figuring out how to spend that money."

"SEATTLE — A unique ice-class barge designed to clean up any oil spills that might result from Shell Alaska’s upcoming operations in the Arctic Ocean has so far failed to acquire final U.S. Coast Guard certification. Engineers from the oil company say it's no longer appropriate to require them to meet the rigorous weather standards originally proposed."