Debby updates: Flash flooding, tornadoes target DC, Mid-Atlantic, Northeast

Debby, which made landfall in Florida as a Category 1 hurricane Monday morning, weakened to a tropical storm just before 11 a.m. ET.

Debby is barreling north with winds of 70 mph.

The storm is forecast to cause major flooding across the Southeast this week.

Rain totals have reached 19 inches in Florida so far.

In South Carolina, the rain total could topple the state’s all-time precipitation record for a tropical cyclone: 23.63 inches from Hurricane Florence in 2018.

Some of the heavy rain will make its way into Virginia by Friday and possibly to the coastal Mid-Atlantic by the weekend.

On Monday, Debby is bringing 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