50,000 California residents are waiting to see if officials can keep this chemical tank from exploding

A damaged chemical tank in Southern California cracked over the weekend, which authorities were hopeful would relieve pressure and reduce the risk of an explosion.Some 50,000 residents in Garden Grove, a city of roughly 170,000 about 40 miles (60 kilometers) south of downtown Los Angeles, have been evacuated and are waiting for a resolution. The tank overheated Thursday and began venting vapors, leaving local and state officials scrambling to evade a worst possible scenario at the aerospace comp...