As a remnant low-pressure center from Subtropical Storm Alberto tracked through northwest Indiana into southwest Michigan on Wednesday, bands of thunderstorms dumped rain over Chicago’s western suburbs. The rainfall at Chicago’s official O’Hare observing site pushed the total for the month to 7.65 inches, exceeding the old May record of 7.59 inches set in 1945.

As forecast, storms intensified in the afternoon, and flood warnings were issued. Flooding was reported in parts of Elgin, Sugar Grove, St. Charles and Hoffman Estates. Sleepy Hollow in Kane County reported 3.67 inches in 90 minutes.

Thursday temperatures are expected to hit 90 again, allowing highs the last week in May to average over 90 degrees — besting the former record of 88 degrees set in 1978.