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(Reuters) - On Sunday, the National Weather Service issued a flash flooding warning for a portion of northeastern Illinois, including Chicago's north metro area.  

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This was after heavy rains flooded viaducts and stranded vehicles, sending water into basements.

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Chicagoans shared photos and videos of cars partially submerged under underpasses, and plumes rising from the sidewalks.

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The Chicago Bears did not cancel a scheduled football game against the San Francisco 49ers at noon (1700 GMT), and posted videos of the team warming in the rain on a sodden field. 

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Even though the heavy rains had stopped at 11 AM CT, the NWS warned roads that they would be flooded until the water receded.

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Twitter: The city urged residents not to drive through standing water in streets, viaducts or low-lying areas.

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These rains can bring down 2 inches (5 cm) of water per hour to a neighborhood. They overflow local sewers, flood mains and push water into basements through private drains.