A thin layer of slippery mud covered about half of Lower N. Stetson Ave. from E. South Water St. to the Chicago River at 11 a.m. on Monday May 18. The other half was submerged in floodwater from a marathon downpour that soaked the city on the preceding day.
The water immersed the entire intersection of Stetson and Lower Wacker Dr., but did not appear to reach the pathway of the Riverwalk roughly twenty yards north.
Elsewhere on the subterranean thoroughfares, Chicago Police rerouted vehicles traveling northbound on Lower Wacker Dr. towards Michigan Ave., while Department of Transportation crews surveyed the scene from Columbus Ave. Bridge.
More than three inches of rain fell on Greater Chicago over the weekend, according to the national weather service. Combined with 3.5 inches that the city received on Thursday, May 14, the unexpected deluge caused several flash floods over the past four days.
The total amount of rainfall recorded in Chicago for the month is 8.19 inches, nearly double the average for the area, according to the National Weather Service. It also represents the third-highest measurement since 1871.
The wettest month of May in the city occurred last year, when 8.25 inches soaked Chicago; followed by the previous year, when 8.21 inches were recorded.
The upcoming Chicago forecast does not appear to offer much relief. Weather.com shows no less than a 10% chance of rain every day until June, and predicts a 40-80% chance of thunderstorms from May 23-25.