Police and firefighters responded to reports of a large explosion followed by a series of smaller explosions on July 3.

California has seen a spate of accidental fireworks explosions leading up to the Fourth of July with a Wednesday morning detonation killing 1 in a Simi Valley home and a similar incident critically injuring two people in a Bay Area residence.

One person is dead after a house fire in Simi Valley, which authorities determined to be caused by explosions from fireworks on Thursday afternoon. The Ventura County Fire Department said they received calls around 11:48 a.