There is a high danger of forest and brush fires Wednesday afternoon.

With just a slight chance of rain in the forecast, the high fire danger is expected to last for a few days.

And on the weekend, some areas of Connecticut may have the first frost of the season.

“The combination of gusty southerly winds, full sunshine and dry conditions (Wednesday) will lead to elevated fire weather potential this afternoon,” the National Weather Service says.

“Southerly winds will gust up to 25 mph, with lowest relative humidity between 35 to 45 percent. Fast spreading fires are possible if one should start.”

The state Department of Energy and Environmental Protection’s forest fire danger is high.

If you have received a permit from your local Open Burning Official to burn brush on your property, the permit is not valid if the Forest Fire Danger is rated high, very high or extreme and you are burning within 100 feet of a grassland or woodland, DEEP says.

“When the woods get dry enough and a fire gets started the fire tends to grow more slowly than a spring fire, but tends to burn deeper into the ground. Fires that burn deeper into the ground burn organic matter in the soil (including tree roots), are more difficult to suppress, and cause extensive mortality to vegetation,” DEEP says.

Areas that have a greater risk of forest and brush fires are in Litchfield, Hartford, Tolland and Windham counties. Those northern counties are the driest in the state with severe and moderate drought conditions, according to U.S. Drought Monitor.

Because Litchfield County has received rain from thunderstorms, it is classified as abnormally dry.

The only chance of rain is Thursday and Friday.

The NWS says we will have a chilly weekend with frost likely across much of the local area Friday, Saturday and Sunday nights with lows down into the 30s each night.

The best chance of frost is in cooler areas of northwestern Connecticut.

Saturday is expected to be the coolest day with temperatures 10 to 15 degrees below with highs mainly in the 50s with lower 60s below 500 feet. Temperatures will gradually moderating to near seasonable levels by Tuesday.

The forecast

Today: Sunny, with a high near 72. South wind 9 to 13 mph.

Tonight: Partly cloudy, with a low around 55. Southwest wind 8 to 11 mph.

Thursday: Partly sunny, with a high near 75. Southwest wind around 7 mph.

Thursday Night: A slight chance of showers. Mostly cloudy, with a low around 51. Northwest wind 5 to 8 mph becoming north after midnight. Chance of precipitation is 20 percent.

Friday: A slight chance of showers. Mostly cloudy, with a high near 63. North wind around 10 mph. Chance of precipitation is 20 percent.

Friday Night: Partly cloudy, with a low around 42.