Tropical Storm Debby strengthened to a Category 1 hurricane as it approached Florida on Monday morning, with sustained winds up to 80 mph. Winds of 74-95 mph had been forecast in areas under a Hurricane Warning in the Big Bend region.
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
2:44 AM EDT
Debby strengthens, with maximum sustained winds up to 80 mph
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
2:15 AM EDT
Coast Guard rescues 2 adrift in sailboat off Florida coast
Two people were rescued Sunday from a boat that was adrift in about 20-foot seas off the coast of Boca Grande, Florida, the U.S. Coast Guard said.
The boaters were airlifted from their 34-foot sailboat after the vessel lost its sail about 73 miles off shore, the guard said.
The sailboat had been on course for Tarpon Springs from Key West, officials said. A friend of the boaters contacted to the Coast Guard at about 5 p.m. Saturday, telling officials they had missed their check-in.
"We received an updated satellite position from the boaters' friend, which led to them being successfully located," Lt. Cmdr. Christopher Hooper, a search and rescue mission coordinator, said in a statement.
The boaters were rescued by a crew on an Air Station Clearwater MH-60 Jayhawk helicopter at about 11 a.m. on Sunday, the Coast Guard said. They had been adrift in seas that were between 15 and 20 feet, with wind speeds at about 50 knots. Visibility was low.
The names of the people on the boat were not released.
-ABC News' Victoria Arancio
11:17 PM EDT
Debby strengthens into a hurricane
The National Hurricane Center has upgraded Tropical Storm Debby to a Category 1 hurricane with winds of 75 mph.
The forecast is still on track for more strengthening overnight as Debby feeds off the warm water in the eastern Gulf of Mexico. Water temperatures running 3 to 5 degrees above average are providing plenty of fuel for this storm to intensify before landfall, which will happen around 7 a.m. ET along the Big Bend region of Florida.