an inversion, a heat inversion. what they need is for the ground to warm up and push that smoke up, up into the sky just a little bit to clear the area so that the spotter planes can at least see where the flames are and they can see their targets. meanwhile 3500 residents have been evacuated. they are not in their homes yet. officials tell us no one is going near their homes, it s just too dangerous right now. people still don t know whether or not they have property to go back to. and it comes down to who has what, it s all been very confusing. here is one resident. right now it s a roulette. we only know about houses that were lost, and as always, there may be some that survived in the past because the fire was very messy, it was a spot fires all over the hillside. reporter: four firefighters have already lost their homes in this blaze, and those firefighters, megyn have been