pFlash-flood warnings were in place for large parts of Illinois in and around Chicago on Wednesday, July 12. Heavy rain overnight triggered flash floodinga for much of the region.ppPolice had to use rubber rafts to help motorists who were stranded because of high water in Fox Lake, according to a news reporta. Thousands were without power, and at least one commuter train line was suspended because of the flooding.ppThis video shows a dog named Lilly swimming through the floodwater in Grayslake.