It has been one week since the explosion rocked this tight-knit community, beginning a massive investigation into what caused the deadly blast by the State Fire Marshal’s office.

The Sacramento County and Yolo County Sheriff's Offices are at a San Francisco home after a deadly fireworks warehouse explosion in Esparto.

Cal Fire's state fire marshal was leading the investigation at the Inner Richmond home on 2nd Avenue, between Geary Boulevard and Anza Street, a Yolo County spokesperson said.