In what experts call "Flash Flood Alley," the terrain reacts quickly to rainfall steep slopes, rocky ground, and narrow riverbeds leave little time for warning.

Survivors have described the floods along the Guadalupe River as a “pitch black wall of death” and said they received no emergency warnings.

Without a modern flood warning system, emergency officials monitor four sensors along the Guadalupe River – including one that was knocked out in the

Plans to develop a flood monitoring system in the Texas county hit hardest by deadly floods were scheduled to begin only a few weeks later.

Heavy rainfall has overwhelmed multiple low water crossings and areas along the Guadalupe River, local authorities reported.

A third Flash Flood Emergency has been issued for the Texas Hill Country area as storms continue to wreak havoc on the region. Residents and tourists along the Guadalupe River in Comal County are being asked to evacuate immediately by the National Weather Service-San Antonio/Austin office.

Texas hydrologists working with the National Weather Service say they recognized the conditions last Thursday that could lead to catastrophic flooding on the Guadalupe River. And they say, based ...

NPR has compiled a timeline of when local, state and federal officials posted warnings on social media as well as the timeline of events as presented by local officials.

But meteorologists say the official National Weather Service forecast gave ample notice for people to get themselves – and others – out of harm’s way. State and local officials say nothing could have prepared them for the Guadalupe River to rise as quickly as it did.

The weather service said the river would begin to overtop upstream of the Alma Avenue Bridge into the Elks Lodge once it rose above the minor flood stage of 8.5 feet.