A storage tank containing 6,000 to 7,000 gallons of methyl methacrylate overheated and vented at a GKN Aerospace facility in Garden Grove, leading authorities to issue evacuation orders affecting 40,000 residents across six cities. Local fire officials stabilized the tank temperature on Friday with no injuries or deaths reported. An unverified report indicates Governor Gavin Newsom issued a state of emergency declaration on Saturday directing state resources to support local jurisdictions.