Hurricane Milton tracker: May be one of Florida's worst storms in 100 years

Nearly 700 flights have been canceled across the country on Tuesday and another 1,500 flights are canceled on Wednesday as Hurricane Milton closes in on Florida.

The St. Pete-Clearwater International Airport, Tampa International Airport, Orlando International Airport and Sarasota Bradenton International Airport are all set to close.

The Florida Division of Emergency Services said it has partnered with Uber to provide free rides to and from shelters as residents evacuate ahead of Milton.

Hurricane Milton's maximum sustained winds were at about 155 mph early Tuesday, classifying the storm as a "powerful" Category 4 hurricane, the National Hurricane Center said.

"While fluctuations in intensity are expected, Milton is forecast to remain an extremely dangerous hurricane through landfall in Florida," the center said in a 1 a.m. ET update.

-ABC News' Jessica Gorman

As of its 11 p.m. ET update, the National Hurricane Center said that Hurricane Milton now has wind speeds of 165 mph, slowing down by 15 mph from earlier Monday.

The storm still poses an "extremely serious threat" to Florida, the NHC said.

It's currently moving toward the Northern coast of the Yucatan Peninsula, per the NHC.

It is still forecast by the NHC to weaken to a Category 3 before making landfall late Wednesday night or early Thursday morning.

-ABC News Senior Meteorologist Melissa Griffin

With Hurricane Milton inching closer to Florida, President Joe Biden spoke with Gov. Ron DeSantis and Tampa Mayor Jane Castor Monday night, the White House said.

"This evening, the President had separate calls with Florida Governor Ron DeSantis and Tampa Mayor Jane Castor to get a firsthand report on recovery efforts for Hurricane Helene, and to discuss preparations for Hurricane Milton," the White House said in a statement. "He asked the Governor and the Mayor to call him directly if there is anything that can be done to further support the response and recovery efforts."

Biden also spoke with director of the National Weather Service Kein Graham, who briefed him on the "expected impacts" of Milton on Florida.

Graham emphasized that "this hurricane could have major impacts and that people in the storm's path should evacuate now while there is ample time to do so," according to the White House.

-ABC News' Molly Nagel