Garden Grove gas leak A chemical tank containing 7000 USgal of methyl methacrylate at the GKN Aerospace facility in Garden Grove, California, United States, overheats and is on the verge of exploding. Over 40,000 residents in the nearby area are ordered to evacuate as response teams do not have a novel solution to prevent the tank from cracking or entering thermal runaway. Sources: KTLA-5 The Guardian