7:45 P.M. - Significant flash flooding possible in North Central LaSalle. A Flash Flood Warning is in effect until 10:45 p.m. Thunderstorms are producing rain rates of 2" per hour. This area has already received 3" of rain and an additional 1-2" is possible.

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.

When the rain comes, Sharen Renee Parish sits on her basement steps and waits for the water to mop up mud, a tall task for the disabled Chicago Transit Authority retiree who needs a caregiver. It worked as heavy rains fell Monday night.

A flood advisory remains in effect for northeast Illinois including Cook, DuPage, Kane and Will counties, weather officials said.

Much of the Chicago area will see temperatures into the 90s today, although temps might be a bit cooler near the lake.

The torrential rainfall that pounded parts of Chicago on July 25 was so extreme, it typically occurs only once every 1,000 years, according to the National Weather Service.

Chicago's weather features sunny days and potential thunderstorms with fluctuating temperatures and humidity levels.