Millions of residents in a major Midwest city are under a flood watch on Tuesday afternoon as National Weather Service (NWS) meteorologists warn of torrential rains that could overwhelm creeks and streams.

Why It Matters

The Flood Watch covered highly developed portions of the Chicago metropolitan area where impermeable surfaces and local drainage patterns can accelerate runoff and concentrate water in streets, underpasses and low-lying neighborhoods.

It comes just a few days after heavy rainfall pummeled other parts of the Midwest over the weekend, prompting Wisconsin to cancel its state fair after parts of Milwaukee saw more than a foot of rain.

What to Know

The NWS office in Chicago issued a Flood Watch at 11:33 AM CDT on Tuesday, placing portions of northeast Illinois and northwe

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