First Alert: storms bring heavy rain, flooding FIRST ALERT ACTION DAY forecast 10 p.m. 3/17 By Amber Ruch | March 16, 2021 at 4:31 AM CDT - Updated March 18 at 2:35 AM (KFVS) - Storms brought heavy rain and flash flooding to the Heartland on Wednesday evening and into the night. This will increase our threat of flash flooding. A flash flood watch was issued for parts of the Heartland. Much of southern Illinois and the northern parts of southeast Missouri will have only threats of hail and flash flooding. After midnight, the threat for severe weather continues to drop. Stay with First Alert Weather for the latest.