The property where the fireworks warehouse explosion occurred this week in Yolo County was zoned for agriculture and not for fireworks storage, according to an investigation by Sacramento TV station,

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.

Rescue crews were searching on Thursday for seven people still missing days after an explosion at a fireworks warehouse in Northern California shook a tiny farming community and forced the cancellation of nearby July Fourth celebrations.