Cuba has lost power after Hurricane Ian made landfall on the island Tuesday, according to reports.

The country's Electric Union said it's working to restore service overnight to 11 million people, The Associated Press reported. The Cuban News Agency had initially reported there is no power.

There is "0 electricity generation" in the country, according to a National Electric System update. "This complicated condition is also associated with complex weather conditions that have affected the SEN infrastructure," the update said.

-ABC News' Mara Valdes, Darren Reynolds

Some Florida residents have begun evacuating their homes as Hurricane Ian approaches.

People are seeking shelter ahead of the storm, which is currently forecast to make landfall as a Category 4 hurricane sometime Wednesday afternoon.

Ian remains a Category 3 storm with maximum sustained winds of 120 mph as of Tuesday might.

It’s moving north-northeast at 10 mph and the center is located about 180 miles south-southwest of Punta Gorda, Florida.

There have been multiple tornado warnings in the area over the past few hours. A large tornado was reported on the ground in southern Broward County, near Davie, at around 7:30 p.m. ET.

-ABC News’ Daniel Peck

Hurricane Ian is barreling toward Florida, and satellite images show the eye of the storm packed with lightning as it strengthens over the Gulf of Mexico.

The storm is currently forecast to make landfall on Florida's western coast on Wednesday between 1 and 6 p.m., somewhere between Port Charlotte and Sarasota.

See the latest maps and read more about Hurricane Ian's projections and possible paths here.

Florida Gov. Ron DeSantis has urged Floridians to take Hurricane Ian seriously as the powerful storm heads to the state.

"You don't get a mulligan when your personal safety is at risk,” he said during a press conference on Tuesday.

About 2.5 million people in the state are under evacuation orders.

"This thing is the real deal. It is a major, major storm,” DeSantis said.

-ABC News’ Darren Reynolds

Caribbean islands such as Jamaica and Grand Cayman will start to experience the effects from the outer bands of Tropical Storm Ian within the next 24 hours, forecasts show. The islands will experience conditions such as heavy rain, possible flash flooding and storm surge.

The storm system will begin to rapidly intensify overnight into Monday before it closes in on western Cuba on Monday night.

As of 2 p.m., the sustained winds in the tropical storm remained at 50 mph as it moved west-northwest at 12 mph, the center about 265 miles away from Grand Cayman.

Hurricane warnings are in effect for Grand Cayman and western Cuba, while tropical storm warnings and watches are in effect in other portions of both islands.

As a hurricane, Ian is expected to peak at a Category 4 before weakening slightly as it looks to make landfall on the west coast or panhandle of Florida in the coming days.

There is still some uncertainty to the track Ian will take once the system enters the Gulf of Mexico.

The center of the storm and the worst of the impacts could end up heading toward the western coast of Florida's peninsula, including the Tampa area. The other possible scenario has the storm moving more due north and bringing a possible landfall along the Florida peninsula, impacting cities like Panama City and Tallahassee with more direct effects.

The storm will begin to impact the Florida keys and the southern portions of the state by Tuesday night.

-ABC News' Dan Peck