Hurricane Ian updates: Florida death toll climbs

The Centers for Disease Control and Prevention put out a health advisory to healthcare professionals treating patients in areas affected by Hurricanes Fiona or Ian, telling them to maintain a high index of suspicion for carbon monoxide poisoning.

"Other people who may have been exposed to the same CO source may need to be identified and evaluated," the CDC said in a health advisory.

-ABC News' Eric Strauss

Four people have died in North Carolina since Friday in storm-related incidents, state officials said Saturday.

Two people died due to car accidents caused by storm conditions, one man drowned in his car and a fourth man died due to carbon monoxide poisoning from a generator.

Among those killed was a 25-year-old man who lost control of his vehicle and hydroplaned into another vehicle, a 24-year-old woman whose vehicle went off a wet road and struck a tree and a 22-year-old man who drowned when his truck left the roadway and submerged in a flooded swamp.

A 65-year-old man died Saturday from carbon monoxide poisoning from a generator running in his closed garage while the power was out. His wife was hospitalized.

“The storm has passed, but many hazards remain with downed trees, downed power lines and power outages,” said North Carolina Gov. Roy Cooper in a press release. “We mourn with the families of those who have died and urge everyone to be cautious while cleaning up to avoid more deaths or injuries.”

A flood watch remains in effect in parts of Virginia and West Virginia on Saturday as Ian’s remnants push north.

The storm is significantly weakened, but winds may still top 35 mph as rain covers the Mid-Atlantic and Northeast this weekend.

-ABC News’ Daniel Amarante

Ian, the first hurricane to make landfall in South Carolina since Matthew in 2016, has not caused any deaths in South Carolina, Gov. Henry McMaster said Saturday.

“Another good story for South Carolina, and we’re open for business,” he said at a news conference.

Ian barreled through South Carolina on Friday. The hardest-hit areas were along the coast from Charleston to Horry County, said Kim Stenson, director of the South Carolina Emergency Management Division. Charleston saw 6 to 8 inches of rain.