Tropical storm warnings and a hurricane watch were issued for the west coast of Florida and the panhandle as Debby crossed the Gulf of Mexico. Heavy rains are expected across the Southeast.

Scientists say gene-editing technology may eradicate a mosquito in the U.S. that spreads dengue and other diseases. Concerns remain about the possible environmental impact of bioengineered mosquitoes.

The Key deer is losing the only place it lives, raising uncomfortable questions for the people tasked with keeping endangered species alive.

The U.S. National Park Service estimated that some 300 migrants arrived in the Dry Tortugas National Park over the past couple days. The park is about 100 miles north of Havana, the Cuban capital.

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.