More than a dozen schools across the Chicago area were on delayed starts or closed Thursday due to icy conditions on roads, streets and sidewalks .

The closures and delays come hours after sleet, freezing rain, freezing drizzle and snow fell across the region Wednesday night and overnight, leading to cars spinning off highways and treacherous walking conditions.

"Due to icy road conditions, River Forest Schools will be on a two hour delay this morning," River Forest School Corporation said in a notice posted to their website. "School doors will open two hours later than normal. Elementary schools will not be serving breakfast."

River Forest School Corporation was one of multiple Chicago-area schools that was reported to be on a delayed start or closed, according to the Emergency Closing Center. Other delayed starts Thursday included District #1 in Momence, Crown Point Community School Corp. in Crown Point, and Tri-creek School Corporation in Lowell.

District #209-U, in Wilmington, reported a full closure Thursday.

"Due to the icy and hazardous road conditions, especially on our rural roads, all Wilmington Schools are canceled today," a Facebook post from the school said . "A decision about all after school activities will be made later today."

A full list of school closures and delayed starts for the Chicago area can be found here . (NOTE: If you are accessing this link from our app, please go to your mobile browser).

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Current Chicago-area road conditions



According to the Illinois Department of Transportation's "Getting Around Illinois" winter road conditions map , multiple suburbs were seeing areas of icing Thursday, especially in parts to the northwest and southeast including Hoffman Estates, Tinley Park, Joliet, Berwyn and Chicago Heights.

In Mount Prospect, ice could be seen covering roads and cars.

Late Wednesday, the National Weather Service warned drivers to consider postponing non-essential travel due to the hazardous conditions.

"There have been numerous accidents on icy roads, some serious," the NWS said, adding that roads that appear clear can in fact be very slippery.

In Chicago, the Office of Emergency Management and Communications warned residents to "take it slow and don't rush."

"Slick is an understatement this morning on sidewalks and side streets!," the OEMC said.

Early Thursday morning, cars slid right off the road, hitting trees and fences, NBC 5's Lisa Chavarria reported, showing videos and photos from the Edens Expressway at Tower Road in the northern suburbs.

Chavarria also warned that parking lots and sidewalks near apartments and homes across the area looked like "ice skating rinks."

When will temperatures go above freezing?



Freezing drizzle may fall at times early Thursday, NBC 5 Meteorologist Alicia Roman said, though it will gradually taper off by daybreak. Temperatures were expected to remain below the freezing mark of 32 degrees until at least 8 a.m., which will keep things slick through parts of the morning commute.

"We'll need to wait until we get above freezing for things to thaw," Roman warned. "A little glaze of ice out there could cause havoc on area roadways that are not treated."

Roman reported ice accumulations in some parts, including Sugar Grove, as high as .14 of an inch At O'Hare International Airport, .13 of an inch of ice was recorded, with .12 of an inch of ice accumulation at Midway International Airport, and a tenth of an inch of ice in Waukegan.

Those totals amounted to flat accumulation between dime and nickel thickness, the NWS said.

"Be careful," Roman said. "It's slick out there."

Between around 8 a.m. and 10 a.m., temperatures will start to climb above freezing, Roman said, leading to improved conditions. High temperatures Thursday afternoon were expected to reach into the upper 30s and low 40s, Roman said.

Winds will also pick up Thursday afternoon, Roman said, with gusts as high as 35 or 40 miles-per-hour, especially overnight.

Friday was expected to be dry, Roman said, though another wintry mix of of sleet and snow could move in by Saturday afternoon.

"We could do it all over again this weekend," Roman said.

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