Cause of chemical tank catastrophe that threatened to blow up parts of Orange County revealed

A failed cooling system may have triggered the dangerous chemical leak at a Garden Grove aerospace facility that led officials to evacuate roughly 50,000 residents over an explosion threat, officials said. Orange County Fire Authority Chief TJ McGovern said that a pressurized storage tank holding 7,000 gallons of methyl methacrylate, a highly flammable liquid used...