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.

The girlfriend of one of three adult brothers who went missing in a fireworks factory explosion this week is speaking out, as she called the siblings 'three incredible men who had so much coming for them.

Seven people remain missing after a warehouse filled with fireworks exploded Tuesday evening in Northern California, officials said.