and debris in the air. they're trying to get masks and respirators, but authorities say that's not necessarily going to help them. they've been running out in certain neighborhoods and communities on the winward side of the island. if you feel your health is in danger, just leave. the respirator is not going to protect you from sulphur dioxide, so if you have health problems, just leave. >> sometimes it's hard for people to understand the potential dangers because they do think traditionally molten lava might move slowly. but this is something that's spewing out of the ground. the velocity is something nobody can really predict, and that heat is dangerous. >> the heat is dangerous, and you know, fred, people, if you have friends that live on the islands, if they're on oahu or kawai, they're not in danger here. we're talking about one portion of the big island, which is very, very big, but people who live in that area have to be careful they don't get trapped by fissures popping up here.