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(CNN) -- What used to be a gorgeous beachfront city now looks like an apocalyptic mess after Hurricane Michael shredded Mexico Beach, Florida.
"Mexico Beach was wiped out," said Brock Long, head of the Federal Emergency Management Agency. "That's probably ground zero."
Michael made landfall Wednesday near Mexico Beach as monstrous Category 4 hurricane, annihilating homes with its 155-mph winds.
"It feels like a nightmare," Mexico Beach Councilwoman Linda Albrecht said. "Somebody needs to come up and shake you and wake you up."
Other catastrophic scenes are emerging across the Florida Panhandle, where Michael left more than 350,000 without power and entire neighborhoods in ruins.
In the decimated city of Callaway, pieces of obliterated houses litter rain-drenched roads. Every telephone pole in sight has snapped in half.
"It's very hard to explain," said Jason Gunderson, a member of the Cajun Navy rescue group. "The only way I can explain it, through my eyeballs, is a Third World country war zone."
The storm has already killed a man in Florida and a girl in Georgia. And as rescue workers sift through the debris Thursday, many fear the death toll will rise.
After slamming Florida and lashing Georgia, Michael is now threatening the storm-weary Carolinas. Tornadoes, dangerous winds and more flooding are possible in many of the same areas still recovering from Hurricane Florence.
Michael is expected to dump 4 to 7 inches of rain from eastern Georgia to the southern mid-Atlantic and up to 9 inches of rain in parts of North Carolina and Virginia, the National Hurricane Center said.
• Interstate 10 is closed: All lanes of I-10 between mile marker 85 to mile marker 166 in Florida are closed due to debris, Florida authorities said Thursday.
• Death toll rises: At least two people have been killed in storm-related incidents since Wednesday.
• No power, no internet: More than 350,000 customers remain without electricity in Alabama, Georgia and Florida.
• Where is Michael? As of Thursday morning, the storm is centered about 40 miles west-northwest of Columbia, South Carolina, and is headed northeast.
'I just need to know he's OK'
Uprooted trees, downed power poles and limited communications have greatly hindered first responders and families trying to reach residents in need.
Megan McCall says her brother Jeff and his family were riding out the storm in the Panhandle. No one has heard from them since Wednesday afternoon.
Her brother was able to tell a friend that his home was starting to get cracks in the walls and water was rushing in Wednesday. A neighbor told McCall that all the docks in the area were destroyed and many people are stuck in their homes as the roads have been blocked with debris.
"I just need to know he's OK," McCall said. "If the house and the cars are destroyed they can be replaced, but my niece needs her dad -- and as much as I sometimes can't stand him, I would do anything to just know he's OK."
In Wakulla County, the sheriff's office made a list of people who decided to ride out the storm and will check on them Thursday, sheriff's captain Chris Savary said.
Fallen debris kill 2 people
In Seminole County, Georgia, a metal carport hoisted by the wind crashed through a roof, hitting the girl's head, the county's emergency management director. Travis Brooks said.
Several hours passed before emergency officials could reach the unincorporated area where the girl was killed, Brooks said.
And in Greensboro, Florida, a man died Wednesday after a tree fell on a home, the local sheriff's office said.
FEMA's Long said he's worried the number of deaths will rise Thursday.
"Hopefully they don't, but those numbers could climb as search and rescue teams get out," he said.
'It looks like a tornado came through here'
On the Florida Panhandle, wind gusts blew off roofs and knocked down brick walls.
Rob Golding opened up his Panama City home to some of his neighbors whose houses were heavily damaged. Some were inside their homes when they saw their roofs fly away, he said.
"My home was built in 1962 (and) is the only one with a solid roof left," Golding said. "My mother, who passed two years ago, she put a lot of money in this house. I asked her to keep her hands on it today, and she did.
"It looks like a tornado came through here," he said.
Effect of climate change
Michael's strength may reflect the effect of climate change on storms. The planet has warmed significantly over the past several decades, causing changes in the environment.
Human-caused greenhouse gases in the atmosphere create an energy imbalance, with more than 90% of remaining heat trapped by the gases going into the oceans, according to the National Oceanographic and Atmospheric Administration. There's evidence of higher sea surface temperature and atmospheric moisture, experts say.
While we might not get more storms in a warmer climate, most studies show storms will get stronger and produce more rain. Storm surge is worse now than it was 100 years ago, thanks to the rise in sea levels.
According to Climate Central, a scientific research organization, the coming decades are expected to bring hurricanes that intensify more rapidly, should there be no change in the rate of greenhouse gas emissions.