NWS / NOAA weather: Flash Flood Warning issued July 4 at 12:08AM CDT until July 4 at 1:45AM CDT by NWS Chicago IL

At 1208 AM CDT, The heaviest rainfall has ended. However, doppler
radar and automated rain gauges indicate 2 to 5 inches of rain fell
in the warned area due to earlier thunderstorms, with the highest
amounts near Homewood. Additional rainfall amounts up to 0.5 inches
are possible in the warned area. Flash flooding continues in the
warned area with several creeks and streams rising rapidly towards
and above flood stage.

HAZARD...Significant flash flooding.

SOURCE...Radar and automated gauges.

IMPACT...Rapid-onset, significant flooding of creeks, streams,
drainage ditches, low-lying areas, and poor drainage
areas. Widespread street and underpass flooding.
Possible flooding of structures. Possible flooding of
highways.

Some locations that will experience flash flooding include...
Chicago, Hammond, Tinley Park, Calumet City, Chicago Heights,
Lansing, Oak Forest, Harvey, Blue Island, Dolton, Park Forest,
Homewood, Alsip, Matteson, Frankfort, Steger, South Holland,
Country Club Hills, South Deering and Midlothian.

Source: NWS / NOAA weather.