Drenching rains along the Texas-Mexico border trapped hundreds of people in flooded homes and in cars stranded in high waters, scrambling rescue crews to calls for help that continued Friday even as the downpours let up.

Severe flooding swept through South Texas and border cities in Mexico on Thursday, as half a year's rainfall drenched the region in less than two days. And more rain is coming. Thunderstorms brought 10 to 15 inches of rain to parts of Texas,