A damaged chemical tank in Southern California cracked over the weekend but the interior temperature rose as authorities worked to reduce the risks of a powerful explosion that has led to the evacuation of some 50,000 residents.
The tank overheated Thursday and began venting vapors, leaving local and state officials scrambling to evade a worst possible scenario at a company site in Garden Grove, a city of roughly 170,000 about 40 miles (60 kilometers) south of downtown Los Angeles. No injuries have been reported.
