From CNN:
An unrelenting Tropical Depression Imelda is causing serious flash flooding in parts of southeastern Texas on Thursday morning, covering roads, trapping people in vehicles and homes, and sending rescuers scrambling to get to those most in need.
Flooding is most serious in counties just to the north and east of Houston — in places like Chambers and Jefferson counties, and its communities such as Beaumont and Winnie. Thursday is the third straight day Imelda is deluging the region. Floodwaters intruded onto Interstate 10 early Thursday near Winnie east of Houston, trapping motorists like Steve Castle.