At least 111 people have been killed and a further 173 are still missing after catastrophic flash flooding swept through ...

A hydrologist explains why the region is known as Flash Flood Alley and how its geography and geology can lead to heavy ...

The Texas Hill Country has been notorious for flash floods caused by the Guadalupe River. Here's why the area is called ...

Heavy rain poured over parts of central Texas, dumping more than a month's worth of rain for places like San Angelo.

From day one the United States has included both states and territories, with the territories treated differently. In 1940, when the Philippines was a U.S. possession, 19 million U.S. nationals ...