Forecast of rain, thunder across Chicago area bring warnings of flooding

A hazardous weather forecast was in effect in the Chicago area as rain, thunder and gusty winds are expected over the next several days.

Forecasters warned the showers could cause river levels to rise, with a possible threat of flooding in low-lying areas, the National Weather Service said. The hazardous outlook covers Cook County, northern Illinois and parts of northwest Indiana.

The rain was expected to begin Monday night and would pick up after 2 a.m. Tuesday, with wind gusts up to 25 mph, weather officials said.

Showers, some thunderstorms and winds up to 30 mph would continue for most of the day Tuesday before tapering off around 3 a.m. Wednesday. An inch of rain could accumulate by Tuesday, weather officials said.

Despite the damp conditions, temperatures Tuesday are expected to hover in the low 50s during the day and drop to the upper 40s in the evening.

Scattered showers, some thunderstorms and gusts up to 40 mph would continue Wednesday morning — with temperatures in the upper 40s.

The rain should taper off in the early afternoon, but only for a few hours, weather officials said. In the evening, a mix of rain and snow was possible and temperatures could fall to the low 20s.

Thursday will be dry and sunny with temps in the 40s.

But another storm system could bring a mix of rain and snow Friday, with highs in the 40s.

To prevent flooding in and around homes, homeowners and renters should reduce use of water during and after a storm, the Metropolitan Water Reclamation District of Greater Chicago advises. Residents can limit use of water by delaying showers and baths, flushing less frequently and waiting to use the dishwasher or washing machine.