COLUMBIA, S.C. - Above freezing temperatures Sunday helped most of South Carolina thaw out after the season's first ice storm caused thousands of power outages and hundreds of car accidents.

But forecasters warned some of the lingering precipitation may cause problems Monday morning as temperatures in the Upstate dip just below freezing.

"There will be quite a bit of melting this afternoon and water running across roads, and where those roads have not been treated will be especially prone to developing sheets of ice - also bridges and overpasses," said National Weather Service meteorologist Wayne Jones, based in Greer.

The ice storm caused more than 300,000 power outages in Georgia on Sunday as crews worked to repair power lines snapped by the ice storm. Air travel also was a problem, as many flights canceled.

Even though conditions were improving Sunday, Jones said there was a likelihood of freezing fog in the Upstate on Sunday night. The freezing fog develops its own thin layer of ice and in some cases can cause fairly widespread icy conditions on roads, he said.

Utility officials estimated about 5,000 customers in the Upstate and Midlands areas were still without power Sunday, but crews were expected to restore most of the outages by the end of the day.

Greenwood County was seemingly the hardest hit with about without about 2,500 customers still in the dark. Those outages were likely caused from the storm's second wave, which brought mostly freezing rain.

"We're rebounding nicely, we're already above freezing," Jones said. "The sun is breaking out in a good many areas so there will be considerable melting."

The storm brought about one to two inches of sleet and some snow to the Upstate and about a quarter- to half-inch of ice in the Midlands.

As temperatures warmed, melting ice began to fall from tree limbs and melt away from roadways and cars. The state Transportation Department reported no roads closed Sunday.