Residents reported hearing multiple explosions from a house near 35th Avenue and Deer Valley Road in Phoenix.

At around 8 a.m. Wednesday, Phoenix firefighters were called to reports of multiple explosions at a home near 35th Avenue and Topeka Drive, north of Union Hills Drive.

A runaway thermal event severely injured four firefighters and prompted major changes to how battery energy storage sites are built and monitored.

A man is fighting for his life Wednesday after reported explosions led firefighters to a large house fire in north Phoenix, where a convicted felon with a history of explosives-related crimes lives.