Idalia updates: Damaging tornadoes, severe flooding from Florida to Carolinas

Multiple counties in Florida are under mandatory and voluntary evacuations as Tropical Storm Idalia barrels toward the state.

People living in zones in Pinellas, Pasco, Citrus, Hillsborough, Levy, Manatee, Sarasota and Taylor counties must evacuate the area, according to multiple county officials.

County officials are also urging people living in mobile homes, low-lying areas and along the coast to leave the area as Idalia approaches.

Officials in Hernando, Jefferson, Manatee and Pasco counties have also issued voluntary evacuation orders for particular zones.

-ABC News' Michael Pappano, Jianna Cousin and Robinson Perez

The Federal Emergency Management Agency is encouraging everyone in Idalia’s path to "get prepared today."

FEMA Administrator Deanne Criswell spoke to Florida Gov. Ron DeSantis and "emphasized the agency's actions and readiness to support the state’s needs." FEMA is also "closely coordinating" with Georgia and South Carolina to provide support as needed.

President Joe Biden also spoke with DeSantis earlier Monday and approved an emergency declaration.

-ABC News' Justin Gomez

Tampa International Airport will close at 12:01 a.m. Tuesday as Idalia nears.

A hurricane warning has been issued from the Tampa Bay area up to the Apalachicola area.

Idalia is forecast to strengthen to a hurricane on Monday and may become a major hurricane by Tuesday night.

Landfall is currently forecast for 8 a.m. to 9 a.m. Wednesday in Florida's Big Bend region.

Storm surge is expected to be a major threat and could reach as high as 11 feet in the Big Bend area.

Up to 1 foot of rain could drench the Florida Panhandle and tornadoes are possible in Tampa and Orlando.

Idalia will move north Wednesday afternoon and evening, bringing heavy rain and potential flash flooding to Georgia and the Carolinas. Idalia will head out to sea on Thursday.

-ABC News' Max Golembo