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90s piling up along with rainfall, flooding

Total rainfall the first four days of September at Chicago's official O'Hare International Airport site has been 1.97 inches, an inch and a half above "normal" but only a third of the 5 to 6 inches at locations just to the north and northwest of the city. Portions of the Rock, Fox, Des Plaines, Pecatonica and Kishwaukee rivers are in flood. The very warm, humid conditions have also added to our number of days reaching or exceeding 90 degrees. After Monday's 92-degree high, our official yearly total is 23 — the greatest number since 2012.

With the approach of the remnant low pressure associated with tropical storm Gordon, temperatures will cool off, but heavy rains totaling several inches could easily spread back over our area in waves, beginning Friday and continuing through the weekend, increasing river levels as well as extending the time in flood.

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