At least 4 dead, dozens still missing in collapsed Florida apartment building

Rescue efforts were temporarily called off overnight due to inclement weather and several surrounding blocks are now closed due to safety concerns.
4:14 | 06/25/21

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Transcript for At least 4 dead, dozens still missing in collapsed Florida apartment building
we do want to get right to the latest on that catastrophe in Florida. We just learned moments ago unfortunately that the death toll now stands at four people. We will be talking with the mayor first on "Gma." That is coming right up. Just a few hours ago excavators arrived to help comb through the rubble for victims and hopefully some survivors. Truly an unthinkable tragedy and take a look at this. There you see what the building looked like before the collapse. And now there are new questions about how it turned into this. You see there all down in just a matter of seconds. Really shocking to she those pictures next to each other. Just after midnight the white house announcing president Biden approved an emergency declaration giving FEMA the green light to help with the disaster relief efforts. Our team is on the ground in Florida with the latest and T.J. Holmes is right there to start us off. Good morning, T.J. Reporter: Hope for the best, Cecilia, but brace for the worst. That was the message from Florida officials yesterday and unfortunately, yes, the news did get worse as you mentioned, the death toll has now gone up and also that number, 99, unaccounted for. That means, Cecilia, there are potentially 99 people still under that rubble behind me but that number, 99 also represents hope because for the families of those 99, that's potentially 99 little miracles just waiting to happen, but the clock is ticking, the danger is not gone and this still remains a desperate rescue mission. Search and rescue efforts temporarily halted overnight due to bad weather and falling debris. Be advised there is debris falling off the building. All units shelter. We have had bad weather roll in. Attention all units on scene per command seek shelter. Reporter: Even amid that, crews quickly resumed the work racing against time to locate people trapped beneath and recover those killed in the collapse of this 12-story apartment building. Search teams are entering the building in 15-minute shifts carrying equipment that weighs 80 pounds. Below ground firefighters are trying to break through the walls of the flooded destroyed garage hoping to find survivors. Fire rescue teams have used dogs, specialized camera equipment and sonar to look and listen for signs of life behind the debris. We did receive sounds, not necessarily people talking but sounds of a possibility of a banging. Short of that we haven't heard any voices. Reporter: Officials say 102 people have been located but as many as 99 people are unaccounted for and at least three died in the collapse. And now we're getting our first look at the moment of destruction. This security camera video from the adjacent condo captures the building's collapse, watch as the first structure falls then moments later a second portion follows. I hear this large like rumbling noise out of nowhere and I see just like white clouds like dust coming out, so I told my mom and sister, told them to start running. We ran, all we could see was just white dust like thick. Reporter: Nicholas Balboa was walking his dog when it collapsed and saw a hand waving out of the rubble and heard a young boy crying, don't leave We could hear somebody screaming. He was sticking his hand up through the rubble. He was just saying, please don't leave me. Don't leave me. That's when I tried to signal a police officer and firefighters to get over there. Reporter: Authorities now worried about the structural integrity of the remaining parts of the complex. So concerned about another possible incident that several blocks around the building have been closed. With dozens still missing, families waiting for word holding photos of the missing sharing information hoping to hear anything from loved ones. Rachel Spiegel's parents Judy and Kevin live in the building. Her father was out of town on business but she says she's yet to hear from her mother. We have not stopped with our hope that she is there and alive and just praying and praying that, you know, I know the teams here are doing everything in their power. We're just praying they spiepdz her. Reporter: Also among the missing Edgar Gonzalez whose family says lives in the condo but have not heard from him. His wife and daughter remain hospitalized.

This transcript has been automatically generated and may not be 100% accurate.

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