Officials caution Chicago residents about potential flooding as heavy rain and melting ice may lead to rising river levels.

CHICAGO (WLS) — There is a risk of flooding and sewer backups Friday morning across the Chicago area as heavy rain moves in.

Rain, drizzle and fog began to move into the area Thursday evening, ABC7 Meteorologist Larry Mowry said.

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Illinois, including all counties in the Chicago area, is under a Dense Fog Advisory until 9 a.m. Friday, as declared by the National Weather Service. However, the very southernmost tip of the state is exempt from this advisory.

As of 7:45 p.m. Thursday, the National Weather Service has not yet issued any official flood watches for counties in the Chicago area.

The period between 6 a.m. and noon on Friday is expected to experience the most intense rainfall. The frozen ground poses a risk of flash flooding because heavy downpours can’t be absorbed into the soil, as explained by Mowry.

FULL FORECAST | Chicago weather: Mild with rain late Thursday

Authorities are closely monitoring Chicago-area rivers for potential flash flooding caused by melting ice. The region experienced near-record high temperatures on Thursday, further raising concerns about the risks associated with the current weather conditions.

Water management officials said Friday will be an overflow action day.

The Metropolitan Water Reclamation District of Greater Chicago issued an alert Thursday asking people to delay showers and baths, flush less frequently and wait to run the dishwasher or washing machine. More information can be found here.

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