FBI searches southern California facility where chemical incident spurred evacuation

Chemical tank overheated in May and forced evacuation of 50,000 nearby residents due to danger of explosion

The FBI is searching a southern California aerospace facility where an overheated chemical tank forced 50,000 residents to evacuate last month, after federal authorities served a search warrant there on Wednesday.

Signed by a federal judge last week, the warrant approved the seizure of records related to the storage, use or disposal" of methyl methacrylate, the chemical stored inside the tank that authorities feared could explode.