The hordes of fish were killed by a red tide, a large "bloom" of toxic algae that appears on Florida's Gulf Coast about once a year. Experts say the bloom shouldn't be happening right now.
Authorities said that 117 individuals remain unaccounted for from the collapsed building in Surfside, Florida. Authorities say demolishing the rest of the building has aided the search.
Elsa is expected to be near the Florida Keys early Tuesday and then pass near or over portions of Florida's west coast by late Tuesday and into Wednesday, forecasters say.