The National Weather Service warned that the Guadalupe River could surge to nearly 15 feet—5 feet above flood stage—by Sunday afternoon.

Here's what to know about the deadly flooding, the colossal weather system that drove it and ongoing efforts to identify victims.

Heads up if you're in the Hill Country or know someone who is. The threat for flash flooding in the areas devastated by last Friday's flooding have increased.

Flash floods in Texas have killed at least 107 people over the Fourth of July weekend, with more than 160 still missing.

Steamy summer conditions for your Sunday with highs in the upper 80s but feeling like the 90s. Skies will be mostly cloudy with isolated storms this afternoon. Any storm could produce heavy rain and localized flooding. Monday is a NEXT Weather Alert Day for tropical downpours and an elevated flash flood risk.

Scholars and designers of early warning systems say that there are still huge gaps in our ability to predict flash floods and warn those at risk.

The Flood Watch covers most of the state, barring some counties in northwestern and southeastern Oklahoma, through at least Sunday afternoon.

Back-to-back flooding disasters in recent years — in Texas, New Mexico and Kentucky, among many others — have showed that preparing for flash flooding is a new necessity as the planet warms.