A Flash Flood Warning was in place Tuesday night as a slow and soaking rain storm pounded the city of Chicago. The warning affected a narrow, but densely populated area that included downtown Chicago.

The National Weather Service is warning of an ongoing threat for flash flooding in the Chicago region through Saturday.

In parts of Chicago, flash flood alerts rang Tuesday, warning of dangerous conditions as cars were stranded and submerged on highways and water rescues were conducted, but how much rain actually fell across the region and how fast did it all happen?