Hurricane Helene live updates: 10 dead, millions without power

Helene -- currently a Category 1 hurricane with sustained winds of 85 mph -- is now located about 425 miles south-southwest of Tampa, Florida.

The worst of the storm surge -- up to 20 feet -- is expected in Florida's Big Bend area, where Helene's set to make landfall.

Landfall is forecast between 8 p.m. and 11 p.m. Thursday as a major Category 4 hurricane with winds up to 130 mph.

Six to 12 inches of rain is in the forecast, with 18 inches projected locally.

-ABC News' Melissa Griffin

Major League Baseball announced Wednesday that the scheduled games between the Atlanta Braves and the New York Mets at Truist Park in Atlanta this week have been postponed due to the forecast and the inclement weather.

The games originally scheduled for Wednesday and Thursday nights have been moved to a doubleheader on Monday, Sept. 30, according to the MLB's statement.

The first game will begin at 1:10 p.m. ET and the second game will begin 40 minutes after the last out of the first game, the MLB said.

Monday is a single-admission doubleheader with only one ticket required for both games, according to the statement.

Helene, currently a Category 1 hurricane, is forecast to make landfall as a major Category 4 hurricane with winds up to 130 mph.

Landfall is forecast between 8 p.m. and 11 p.m. Thursday in Florida's Big Bend region.

Mandatory evacuations are in effect in parts of at least 20 Florida counties, including Taylor, Sarasota, Gulf and Hillsborough.