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.

YOLO COUNTY – Seven people were missing Wednesday afternoon, a day after a warehouse storing fireworks exploded in Yolo County, authorities said. The explosion also sparked a vegetation fire and triggered evacuations.

Seven people were still missing Thursday following a fire and explosion at a fireworks warehouse in rural Northern California.