Flash flooding is a threat for Florida, Georgia and South Carolina.
Hurricane Debby is roaring across Florida as a Category 1 hurricane after making landfall Monday morning.
A hurricane warning was issued for Florida's Big Bend area, from near Cedar Key to Apalachicola.
On Monday, Debby will bring very heavy rain from Gainesville and Jacksonville, Florida, up to Savannah, Georgia, where more than 20 inches of rain is possible.
By Tuesday, Debby is expected to stall over the Southeast, bringing potentially historic rainfall to Georgia and South Carolina. Up to 30 inches of rain is possible through Thursday.
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Storm surge and flooding are major threats to Florida as Hurricane Debby slams the state, Gov. Ron DeSantis warned Monday.
Significant flooding has already impacted the Bradenton and Sarasota County area up to North Florida, he said.
The National Guard and Florida Highway Patrol are on standby, DeSantis said.
-ABC News’ Victoria Arancio
Hurricane Debby made landfall near Steinhatchee, Florida, on Monday morning, the National Hurricane Center said.
-ABC News’ Max Golembo
Hurricane Debby is "very near" landfall along Florida's Gulf Coast, the National Hurricane Center said at 5 a.m. ET.
"Expected to bring life-threatening storm surge in portions of Florida and major flooding in the southeastern United States," the center said in an update.
The Category 1 storm had maximum sustained winds of an about 80 mph as it approached Big Bend, a northern area near the Panhandle, the center said.
-ABC News' Max Golembo and Kevin Shalvey
Hurricane Debby continued to strengthen, with maximum sustained winds rising to 80 mph, making it a Category 1 hurricane, according to the National Hurricane Center.
More than 10 inches of rain fell on the west coast of Florida, around the Tampa Bay area, where water rescues have been on going near Clearwater. Significant flooding also has been reported in Fort Myers area.
Storm surge has been rising quickly now along the Big Bend area in Florida, from Cedar Key to Keaton Beach, where up to 10 feet of Gulf water could inundate the coastline. The storm is forecast to make landfall in that area on Monday morning.
-ABC News' Max Golembo
