With a cold front swooping in tonight, the wildfire threat will shoot up in the Lowcountry, which already has seen a spike in blazes in the past week.

South Carolina’s fire season does not typically peak until early spring, but winter weather already has dried out vegetation, turning brush and grass into prime kindling. And with a relative humidity of only 20 percent Tuesday, conditions will be ripe.

The risk should remain elevated at least until Friday, when forecasters expect a slight chance of rain.

“It’s not critical, but it’s pretty dry right now in the coastal areas,” said John Quagliariello, a meteorologist at the Charleston station of the National Weather Service, which issued a fire-danger statement this afternoon. “It makes it a lot easier for things to start burning.”

Seven wildfires have been reported in the past week in the Lowcountry, which is now the most active region statewide, according to the S.C. Forestry Commission. The largest among them was a 50-acre blaze that ruined several abandoned mobile homes Thursday and closed in on an Interstate 26 rest area near University Boulevard in North Charleston.

Colleton County Fire-Rescue crews snuffed two blazes last week.

On Wednesday, a burning barrel of debris was left unattended on Estates Drive outside Walterboro. It ignited the grass in three backyards, destroyed a shed, damaged another storage building and singed a fence.

The next day, high wind pushed a grass fire through a junkyard at 1285 Nunuville Road, destroying 10 vehicles, several lawn mowers and some tools. The fire started when a junkyard worker using a torch accidentally ignited the lawn.

Firefighters again kept the flames from spreading to a nearby home.

Colleton Fire Chief Barry McRoy said his department handles about 450 wildfires yearly. With drier air setting in for the winter, he said, people need to be mindful when they decide to torch yard debris.

“People will set something on fire, then go back inside,” McRoy said. “If they don’t put it out, it can smolder for three or four days, then flare back up at any time.”

But the savior this week might be the absence of what helped the Walterboro-area wildfires: wind.

The weather service forecast for Tuesday calls for only 8 to 12-mph winds blowing from the northwest, though higher gusts are possible. The rest of the week should be even calmer.

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.