Hurricane Helene live updates: 6 dead, 4 million without power

Helene, currently located about 180 miles east southeast of Cozumel, Mexico, strengthened to a tropical storm on Tuesday morning.

The forecast shows Helene moving through the Yucatan Channel Wednesday morning, bringing near hurricane-force wind gusts to Cancun, Mexico.

By Thursday morning, coastal flooding will reach Florida, including Naples and Fort Myers.

On Thursday night, Helene will make landfall near Apalachicola, Florida.

Dangerous wind gusts up to 105 mph are expected and storm surge will be a major threat for the Tampa Bay area.

By Friday morning, the center of Helene will be near Atlanta, bringing strong winds to Georgia, Tennessee, South Carolina and North Carolina.

Downed trees and power lines will be a major danger across the Southeast.

The flash flood threat will continue into the weekend in the Tennessee, Ohio and Mississippi River Valleys.

Helene is forecast to be a major hurricane by the time it makes landfall Thursday night, Florida Gov. Ron DeSantis warned Monday.

A state of emergency has been declared in 61 of Florida's 67 counties, DeSantis said.

"The Big Bend and Panhandle should be especially prepared for a direct impact," the governor said, and he urged residents to know their evacuation zone.

"You have time to be able to put this place into place," DeSantis said, noting Helene’s impacts could begin Wednesday.

Helene will strengthen to a hurricane Tuesday night, and rain is expected to begin in Florida Wednesday afternoon into Thursday morning.

On Thursday evening, Helene will make landfall along Florida’s Big Bend area, located between Tallahassee and Gainesville.

Storm surge could reach up to 15 feet in the Big Bend area.

Heavy rain and strong winds are also major threats.

A hurricane watch is in effect for Florida’s Gulf Coast and a tropical storm watch was issued from Orlando to the Florida Keys.

By Thursday night into Friday, the storm will quickly push into Georgia with very heavy rain, gusty winds and possible flash flooding.

This weekend, the storm will stall over the Mid-South, bringing heavy rain and possible flooding to the Tennessee, Ohio and Mississippi River Valleys.

A flood watch has been issued in Florida from Fort Myers to Tampa to Tallahassee, as well as in southern Georgia and Alabama.