The National Weather Service has issued a flood watch in effect until 4 a.m. Tuesday. Residents are urged to reduce water use to ease pressure on the sewer system. City Council members on the Southwest Side call on the mayor to speed flood response.

Damaging storms brought heavy rain that flooded roadways overnight, especially on the city's Southwest Side that saw flooding last month. Thousands of ComEd customers were without power for hours in the Chicago area.

The city announced the technology after heavy rain and storms damaged homes and left cars submerged on the South and Southwest Sides in July.

Flash flooding has causes devastation in recent months in Chicago and multiple aldermen are asking Mayor Brandon Johnson for financial help to assist families affected.

The National Weather Service (NWS) issued a flash flood warning for key parts of Chicago on Friday, urging approximately 600,000 residents to take immediate action to protect life and property.

Chicago to install new early warning system for flash flooding The city will install 50 sensors across Chicago and eventually alert residents to flooding in real-time through an app. Aug 11 00:19

Strong storms moving through the Chicago area on Monday could bring high winds, heavy rain and flash flooding.ABC7 Chicago is now streaming 24/7. Click here to watchA Severe Thunderstorm Warning is in effect for Cook,