tonight, surfside officials are warning residents of a sister building, the champlain towers north, and they're warning them to evacuate now. we have a full team on the ground in surfside watching all the developments as the desperate search for survivors continues. cnn's randi kaye is following the multiple challenges facing rescue teams. our own ryan young is over at the family reunification center, it's only a couple of blocks away. people can only watch and wait and pray where they are. randi, let's start with you, update our viewers on the very latest. >> reporter: wolf, they are still having a very active search scene here. certainly an active search and rescue mission still under way. they have dealt with a lot of obstacles. they've had torrential rains. they've had thick smoke coming from fires that have started in that building. and they're dealing with yet another fire today, which is really hampering the search and rescue efforts. they are -- we are told that the