Tropical Depression Imelda dumped more than 42 inches of rain in parts of the Greater Houston area, but the Katy area did not receive as much precipitation, according to the Harris County Flood Warning System. The Katy area received between 1.24 inches and 5.32 inches of rainfall between 7:30 a.m. Sept. 19 and 7:30 a.m. Sept. 20, according to the FWS. In the map below, see how much precipitation Harris County gauges measured throughout the Katy area. Follow all of our Houston-area flooding coverage