"As a mom, I'm focusing on my son and my daughter, but inside I'm a complete mess. We lost the house and everything inside," said Denise Dalton.
The last time that happened was in 1924. Pressure built up, followed by an explosion so powerful, rocks the size of cars were launched out of the crater.
The volcanic eruption in Hawaii has a lot of people wondering if a similar eruption could happen in California.
If the lava level drops to the level of groundwater beneath Kilauea Caldera, the influx of water could mix with the magma and cause steam-driven explosions.