Officials racing to prevent an overheating chemical tank in California from exploding breathed a small sigh of relief Monday after confirming a crack in the structure had helped reduce pressure inside,

California emergency officials were conducting an overnight mission to measure the pressure in a tank at risk of leaking or exploding, which has forced evacuation orders for more than 40,000 Orange Co...

TJ McGovern, interim fire chief of the Orange County Fire Authority, said in a video message posted on social media that a team of specialists on Saturday night found "a potential crack in the tank, w...