john hendren, abc news. >> it's amazing. we turn back now to joplin, a town of about 50,000. as much as 75% of that town is destroyed. >> erin hayes is there for us this morning with the latest. erin, good morning. >> reporter: this tornado was ferocious. it hit in the late afternoon, it was daylight. so people saw it coming. it was terrifying. the twister slammed into buildings. it sent debris flying through the city at tremendous speeds. this is a pile of five vehicles. crushed, mangled together. on the door of this one, an x. this is what rescuers have had to do. check vehicles, buildings, large piles of debris, to see if people were trapped inside. rescuers don't know how many people were injured in this tornado. they still do not know how many people died. they still do not know if there are people that remain trapped in building or vehicles from this twister. they'll be searching all night. they're praying with the light of day, they'll be able to get some answers. rob and peggy? >> the light of day is shedding light on that incredible damage. our thanks to erin hayes. >> "good morning america" has a team just arriving in jo