By Aditi Sangal, Meg Wagner and Melissa Macaya, CNN
Rescue crews heard sounds from the rubble throughout the night, Chief Ray Jadallah with Miami-Dade Fire Rescue said in a press conference.
"We have hope, and every time that we hear a sound, we concentrate on that area ... as we continue to hear those sounds, we concentrate on those areas," he said.
"We will continue search and rescue, because we still have hope we will find people alive," Miami-Dade County Mayor Daniella Levine Cava said in a press conference.
Moments ago Levine Cava said 159 people remain unaccounted for. Search and rescue operations are continuing today.
Miami-Dade County Mayor Daniella Levine Cava says there are now 159 people unaccounted for after the partial building collapse in Surfside, Florida. This has increased from at least 99 people.
The number of accounted people has also gone up to 120.
"Unfortunately, this has been a tragic night. We do have 120 people now accounted for, which is very, very good news. But our unaccounted for number has gone up to 159. In addition, we can tragically report the death count is now four," she said Friday.
"I want to be very clear about the numbers. They are very fluid. We'll continue to update you as we have them ... The search and rescue team worked throughout the night, and it was a very active scene," she said.
President Biden has approved an emergency declaration for the state of Florida.
"The president’s action authorizes FEMA to coordinate all disaster relief efforts, which have the purpose of alleviating the hardship and suffering caused by the emergency on the local population, and to provide appropriate assistance for required emergency measures, authorized under the Robert T. Stafford Disaster Relief and Emergency Assistance Act, to save lives and to protect property and public health and safety and to lessen or avert the threat of a catastrophe in Miami-Dade County,," a FEMA press release states.
FEMA is now on the ground in Surfside to assist in the response to the catastrophic collapse of the Champlain Towers South building.
Florida's FEMA Director, Kevin Guthrie, said he received the emergency declaration from FEMA shortly after midnight. Guthrie said the declaration will turn on debris removal, emergency protective measures and individual assistance for reimbursement.
The FEMA state regional coordinator, who was the first to arrive, was on the scene around 3:00 a.m. ET.
From CNN en Español's Gerardo Lemos and CNN's Radina Gigova
Authorities from several countries in Latin America have confirmed that nationals from their respective countries resided or were in the building in Surfside, Florida, that collapsed early Thursday.
Here is the breakdown:
From CNN's Aditi Sangal
As the search continues for the 159 unaccounted people after a partial collapse of a residential building in Surfside, Florida, Fire Marshal Jimmy Patronis says the crews are being “innovative.”
“We're even going and looking at the license plates of the cars that are in the parking garage to try to do more cross-referencing and matching to verify if people are in or out of the building,” he told CNN.
Talking to families waiting for an answer in such a situation is “tough,” he added.
“That's about the hardest place I've ever dealt in my entire life was was meeting with the families there. But we have got to get the answers to understand who could still be in the building,” he said Friday.
Working through such a building presents unique challenges.
“You got a lot of other combustible materials that, eventually, they will catch to a point where they will ignite. Well now, you are adding water to the building to control a fire, while men and women are saving lives and that water adds a tremendous amount of weight. It then, challenges the integrity of what is still standing there. And then, that delicate balance of saving lives, while risking lives," he said.
A team of 80 people is involved in this effort and crews from Orlando and Naples will also join in later today, Patronis said, adding that the one mission of the crew is to save lives.
“We’re going to do everything, put every effort of our energy into saving the lives in that building, and the families deserve it. The people deserve it," he said.
From CNN's Melissa Alonso
Miami-Dade County rescue teams are still battling fires, water and shifting materials at the at the Surfside collapse site almost 30 hours after the building crumbled to pieces in the middle of the night, Florida State Fire Marshal Jimmy Patronis told CNN's Sanjay Gupta Friday morning.
"You get a lot of lithium-ion batteries and other combustible materials that eventually they will catch to a point where they will ignite," he said.
Crews are using search dogs to comb through the rubble "and of course listening for anything that could be a clanging, but as you're pumping water out, you're also shifting materials that creates a ripple effect and you're competing with all the noise of the equipment," said Patronis.
"They're doing the best they can with what they've got, [its] a tremendous risk," Patronis added.
"You're adding water to the building to control the fire while men and women are saving lives, and that water adds a tremendous amount of weight. It then challenges the integrity of what's still standing there, and then that delicate balance of saving lives while risking lives," Patronis said.
Patronis said added "they're being innovative." Crews are "looking at the license plates of the cars that are in the parking garage to try to do more cross-referencing and matching to verify that people are in or out of the building as you assemble this manifest, [and] as you talk to the loved ones in the unification center," said Patronis.
"We had every department in this region in response, but the skill set that these men and women have are unique," said Patronis of Miami-Dade Fire Rescue teams. "They are...built to go from building to building after hurricane disaster, manmade or natural, they're used to digging through debris to find lives."
Rescue teams from Orlando and Naples are expected to arrive later today to supplement the rescue efforts.
The frantic search for dozens of missing people has been underway overnight after a residential building partially collapsed in Surfside, Florida, early Thursday.
Miami-Dade County officials are expected to give updates at a press conference at 8 a.m. ET.
At least four people are dead, according to county officials, and at least 11 were injured in this incident.
The cause of the collapse is also unknown. Authorities will investigate the possible cause after the search and rescue operation is completed.
From CNN’s Rosa Flores, Gregory Lemos and Tina Burnside
Four people have died from the Surfside building collapse according to Rachel Johnson, spokesperson for Miami-Dade Mayor’s office.
The mayor of Miami-Dade told ABC that three bodies were pulled from the Champlain Towers South wreckage overnight, though none of them have been identified.
“Tragically, I woke up to learn that three bodies had been pulled from the wreckage overnight,” Mayor Daniella Levine Cava said Friday on ABC’s “Good Morning America.”
Levine Cava said the development is “devastating news for families waiting for any hope for survival.”
She confirmed there are now four total dead, but said she is “very hopeful” there are people who can still be rescued.
The mayor said 102 people have been accounted for, “and that number is way up from the original count so we are very, very grateful.”