"Flash Floods" Top 5 Page for this destination Big Bend National Park Warnings Or Dangers Tip by XenoHumph

Okay, it is a desert, and most of the time it is bone dry. But, when it rains, it is generally violent thunderstorms that pour a huge quantity of water in a short time. River beds (called wash here because most of the time they are dry, but get washed from time to time) suddenly fill up, and there has been people deaths by being swept away by strong sudden water floods.

Be especially careful when you plan to visit a canyon like Santa Elena, Boquillas or less famous ones, as these can fill up real quick with torrent water. Make sure no rain is in the forecast (to make sure, go see the weather forecast posted at all the park's visitor centers).