>> are you okay? >> i can't hear! i can't hear! >> as this fertilizer plant continues to smolder right now this afternoon, authorities are not ready to give up on finding survivors trapped in the rubble from that blast. it could be felt 50 miles away. >> incredible, the reverberations from this blast and search and rescue teams are combing at this hour, as they have been for hours and hours through all the debris from last night's massive explosion. the thing is, and this is difficult here as we're trying to report on the story, they don't have a firm handle on the number of missing. the estimate is between five and 15 people are dead. more than 160 are injured. but again, those numbers are loose at the moment. the blast flattened homes up to half a mile away. take a look at this from our affiliate wfaa. >> i want to say some of the devastation we're seeing now that daylight is out, this