Power outages were reported throughout the Chicago area and several Illinois counties as Commonwealth Edison Company – ComEd – services were impacted by rain and high winds.

The power outages impacted nearly 26,000 customers, NBC Chicago reported, adding that there are 539 active outages.

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Here’s a look at the current number of outages by Chicago-area county as of 5 p.m. CST: (As per NBC Chicago)

Cook: 8,412
DeKalb: 287
DuPage: 141
Kane: 6,209
Lake: 3,156
McHenry: 2,893

The system moving through the Chicago region issued an ice storm warning in McHenry County, with the remaining area affected by heavy rains and freezing temperatures.

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Firefighters across the region are responding to dozens of tree branches falling on power lines and transformers on fire. Transformer fires have been reported in western Rockford and near Cherry Valley.

The ice storm warning in McHenry County remains in effect until 6 am on Thursday, according to the NWS office in Chicago.

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A winter weather advisory is also issued for parts of the Chicago area, affecting Lake County, DeKalb County, Kane County, and northern Cook County until 6 am Thursday, with a sharp cutoff in the area where rain accumulation transitions to ice accumulation.

“ComED does have crews ready to respond to outages in Northern Illinois. We have upped some of our on-call staff members to ensure that we are meeting our customers’ expectations to restore power as quickly as possible during this ice storm,” said Rebecca Dempsey, Senior Communications Specialist with the energy company. Workers are preparing for the worst but hoping for the best, she said.

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Outages occur during an ice storm due to ice forming on power lines and surrounding trees. The ice can cause these power lines to snap and three branches to fall. ComEd monitors their power lines throughout the year to reduce the chances of heavy power outages across the region, said Dempsey. However, with the intensity of the ice forming in the region, outages are still going to occur.