lisa stewart is one of the first responders. >> the flames were shooting up hundreds of yards and theaque smoke was just everywhere. >> when cameraman david villarreal gets to the scene, he moves as close as he can to the fire and resumes filming. >> i was probably two football fields away from the tank, itself, still smoking and occasional flames. >> trying to get enough water on there to go ahead and try and knock it out. >> the smoking cauldron ominously flares up. >> what is causing the flash we keep see something. >> right now, that could be several things. >> as i was videotapeing the tank fire there were a few flare-ups. you could see the flaem billow out. as soon as it flared up, they put water on it, go back down. >> officials believe the flooi fire is engs clo to being extis being exping i ting wi exextinguished. >> i was ready to back and leave. >> but a dangerous condition known as a boil over is brewing. >> a couple fire departments looked at the footage and you know was apparently one of the first times a boilover type of explosion had been caught on tape. >> a boilover