SURFSIDE, Fla. (AP) — The discovery of four more victims in the rubble of a collapsed condominium building raised the death toll to 36, a fire official said Tuesday as a ramped-up search effort faced new threats from severe weather with Tropical Storm Elsa lashing Florida on a path that would mostly bypass the collapse site.

Miami-Dade Assistant Fire Chief Raide Jadallah announced the new death count to family members during a closed-door morning briefing Tuesday, according to video posted on social media. He said rescuers have also been locating more human remains.

Jadallah said there was a two-hour delay early Tuesday as a result of lightning. He said workers have removed 5.5 million pounds of debris from the pile.

At the site of the collapsed building Tuesday morning, power saws and backhoes could be heard as workers in yellow helmets and blue jumpsuits sifted through the rubble for a 13th day. Stiff winds of 20 mph (32 kph) with stronger gusts blew through the area as gray clouds from Elsa’s outer bands swirled above.