The warning affected a narrow, but densely populated area that included downtown Chicago. Flash flooding was seen from the downtown area through the West Side along the Eisenhower Expressway to Oak Park, as the slow-moving storm hovered stubbornly over the area.

The much-awaited preliminary report on the devastating Air India crash, involving a Boeing Co. BA +1.68% Get Free Report airplane, in June, which claimed 260 lives, is expected to be released by the end of this week.

The Aircraft Accident Investigation Bureau (AAIB) is expected to release its preliminary report this week on the Air India plane crash in Ahmedabad, which resulted in the deaths of at least 260 people.