As fireworks crackled in the night sky and flames flickered from a warehouse explosion in Yolo County, a mother cried out the names of her three missing sons.

SAN JOSE – A major explosion at a pyrotechnics facility in Yolo County has forced the cancelation of a Fourth of July fireworks display at Lake Cunningham Park in San Jose, but a celebration will still take place, according to an city official.

Seven people are still "unaccounted for" in Yolo County's town of Esparto after several explosions at a fireworks warehouse resulted in a fire, officials said.