California has seen a spate of accidental fireworks explosions leading up to the Fourth of July with a Thursday 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 believe may have been caused by a possible explosion Thursday afternoon. The Ventura County Fire Department said they received calls around 11:48 a.m. about a possible explosion that could have been caused by fireworks on the 1600 block of Edmund Street.

Emergency crews responded midday Thursday to a fire at the home in Simi Valley, located in Ventura County in the greater Los Angeles area.