APS McMicken battery explosion remains a national safety benchmark

A 2019 deflagration at the Arizona Public Service McMicken battery-storage facility in Maricopa County injured four firefighters. The incident is widely cited as a benchmark case for battery-storage toxic-gas hazards and is used in local zoning-hearing oppositions nationally. Primary source: SafeGridUnited national dataset (seeds/national-v2.csv), Peoria & Surprise (Maricopa County) row.