"Investigators were looking at how a small, seemingly insignificant leak at one of the country's biggest oil refineries quickly unraveled into an intense fire that sent acrid black smoke into the sky and hundreds of people to hospitals with health complaints."

"The U.S. Nuclear Regulatory Commission suspended final decisions on licenses for power plants until it completes a reassessment of risks related to storing spent atomic fuel ordered by a federal court in June."

"Tropical Storm Ernesto picked up speed in the western Caribbean on Monday as it moved toward Mexico's Yucatan Peninsula, dousing Honduras and Belize on its way."

"Thousands of East Bay residents were ordered to stay in their homes with the windows and doors closed Monday night after a series of explosions and fires tore through Chevron's Richmond refinery."

"LINCOLN, Neb. -- Thousands of fish are dying in the Midwest as the hot, dry summer dries up rivers and causes water temperatures to climb in some spots to nearly 100 degrees."

"The relentless, weather-gone-crazy type of heat that has blistered the United States and other parts of the world in recent years is so rare that it can't be anything but man-made global warming, says a new statistical analysis from a top government scientist."

"OKLAHOMA CITY -- Some Oklahoma residents have returned to emergency shelters despite evacuation orders in many areas of the state being lifted, as wildfires continued to burn."

"TOKYO -- The Japanese utility that operates the nuclear power plant sent into meltdown by last year's tsunami received a trillion yen ($12.8 billion) public bailout Tuesday, effectively putting it under government control."