Three people were injured Thursday after a propane tank explosion destroyed homes in Wayne County, Pennsylvania.

What sent a chemical storage tank in Garden Grove, California, to the verge of either leaking or blowing up?

The exact nature of the damage, and what contingencies are in place to deal with it, have not been made clear.

Videos circulating on social media showed the moment the tanker went up in flames near Tepeaca, a small city roughly 35 ...