Human remains have been uncovered amid the debris of a firework warehouse, days after it caught fire and exploded, setting off a wild pyrotechnics display over California.

In the first moments after explosions at a fireworks warehouse in Esparto rocked the community, a man who lived nearby sprang into action towards falling flames and live fireworks, just hoping he could help.

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