RALEIGH, N.C. -- A thick blanket of snow fell across the Carolinas on Sunday, contributing to at least one fatal traffic accident and power outages affecting more than 180,000 customers. Officials warned highway travel could get more dangerous early Monday as temperatures were forecast to drop well below freezing throughout most of the two states, icing wet roads. The National Weather Service said that as much as 15 inches of snow fell in the North Carolina mountains and three other counties reported about a foot of snow. Ten inches were reported in Wake County around Raleigh, 5 inches around Charlotte and more than 8 inches near the coast at Fayetteville. A state of emergency was declared for the entire state. In South Carolina, the winter weather extended from Greenville with more than 3 inches of snow to a dusting of about an inch in Charleston. There was one traffic fatality near Charlotte and the ambulance taking the injured to a local hospital was also in an accident. Julia Jarema, spokeswoman for the North Carolina Division of Emergency Management, says weather and alcohol contributed to the car wreck. It ran off the shoulder of Interstate 85 and crashed into a utility pole. Jarema said 24-year-old passenger Hannah Ruth Floyd of Chester, S.C., died and the driver and another passenger were injured. The cause of the ambulance crash is still under investigation. Jeff Keith, spokesman for the Mecklenburg EMS Agency, said an injured person from the initial accident receive no further injuries in the ambulance wreck. The driver of the second car was taken to a hospital with non-life-threatening injuries and three EMS workers were checked out and released from a hospital. In all, North Carolina troopers responded to more than 1,560 calls between midnight Saturday and 3 p.m. Sunday. South Carolina Highway Patrol spokesman Lance Cpl. Bill Rhyne said statewide totals on collisions from the storm won't be compiled until later in the week. But, he said, Greenville County reported fewer than three dozen crashes between noon Saturday when the snow started through noon Sunday. "That's not an overwhelming number," he said. Rhyne said the real concern was freezing temperatures overnight with wet roads creating black ice. Some government offices and businesses in both states were planning later starts or were going to be closed Monday to help reduce traffic during the morning rush hour. More than 180,000 electric company customers in both Carolinas lost power in the storm, according to the websites of Duke Energy, Progress Energy and South Carolina Electric & Gas Co. As some customers came back on line, others lost power, and more than 40,000 were still without power as of 5 p.m. But power company officials said the storm was moving into the eastern part of both states plus freezing temperatures across the region could mean more outages. For some, the white Christmas was a once in a lifetime experience. "I have two siblings that were very small the last time it snowed at Christmas, but not myself," said Diane Smith, 55, of Franklinton, N.C. The National Weather Service said 9.5 inches of snow fell in Franklinton, N.C., about 30 miles north of Raleigh from Saturday through Sunday. Smith said her power was out for about four hours Sunday morning, but she and her husband have a generator. Family members, including two grandchildren, who live nearby came over for breakfast and to get warm before going home after power was restored. "It's beautiful," Smith said. "As long as I have power, I love it."