Seven people are missing after a massive explosion at a fireworks warehouse shook a rural California community, upending Fourth of July celebrations and leading to an investigation into the incident.

Investigators have located human remains following an explosion at a Northern California fireworks warehouse, Yolo County said in a statement Friday.

The explosion, which left seven people missing, started a wildfire and forced some cities and counties to cancel or postpone Fourth of July fireworks shows.

Patriotic pizzazz will reign at locations across the region July 4, with fireworks adding sparkle to festivities at the Queen Mary, Knott's Berry Farm, and the Hollywood Bowl. A drone show will light up the sky at Gloria Molina Grand Park in DTLA,