Hurricane Irma officially made a second landfall Sunday afternoon as a Category 3 storm near Maro Island, Florida. Observations on Marco Island measured winds gusting up to 130 MPH just before the eye came onshore around 3:30 p.m. ET.
Further to the north, Naples measured a peak wind gust at 142 MPH.
The first landfall came Sunday morning at 9:10 near Cudjoe Key. The National Weather Service said that wind gusts were measured above 100 MPH on the Florida Keys.
Officially, Irma was a Category 4 hurricane during its first US landfall Sunday morning.
The hurricane continued to move past the Florida Keys, and drifted into the Gulf of Mexico before making another landfall.
Irma packed winds of 110 MPH as of 7 p.m. as it lashed much of Florida, down from 130 MPH earlier on Sunday.
Three people have died in Florida with Hurricane Irma's power to blame; officials said all three were the results of automobile crashes. Among those killed was an on-duty sheriff's deputy who had just left a hurricane shelter.
Almost the entire state of Florida is under a hurricane warning affecting at least 36 million people, with concerns of devastating gales, heavy rain and life-threatening storm surge.
Those who did not evacuate ahead of the storm are in danger, Federal Emergency Management Agency Administrator Brock Long said Saturday.
"You're on your own until we can actually get in there and it's safe," he told CNN.
"The message has been clear: The Keys are going to be impacted. There is no safe area within the Keys. And you put your life in your own hands by not evacuating."
There have also been dozens of tornado warnings througout the state of Florida.
Here are the latest developments:
-- More than 1.3 million electric customers are without power, Florida Power and Light said Sunday.
-- A majority of those who lost power are in Monroe County, where Key West is, and Miami-Dade County.
-- Hurricane warnings were extended north along Florida's west coast as far away as Perry. They include the Florida Keys, Fernandina Beach and Lake Okeechobee.
-- A storm surge warning wraps around the state, from Brevard County to Tampa Bay.
-- More than 72,000 people have moved into more than 390 shelters across the state, the governor's office said.
-- At least 24 deaths have been blamed on Irma in the Caribbean islands, where it hit fast before marching toward Florida.
-Tropical storm warnings have been issued as far north as Atlanta.
- A crane has collapsed in Miami, but has not caused any injuries.
- A fast-moving tornado was reported by the National Weather Service near Fort Lauderdale International Airport.