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Mix of Heavy Rain, Melting Snow Puts McCook Reservoir to the Test

The 3 to 5 inches of rain that fell on the Chicago area over the last two days, along with melting snow, caused heavy flooding in the south Chicago suburbs and northwest Indiana. It was also the first test of the huge new McCook Reservoir that opened in December. 

Below: A time-lapse video shows the McCook Reservoir filling up with water this week, beginning Monday through Wednesday morning.

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Combined Rain and Melting Snow Poses Flooding Risk in Chicago

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Weekend Storm Overwhelms Chicago’s Sewer, Deep Tunnel System

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