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.

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

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 National Weather Service released a flash flood warning at 1:17 p.m. on Saturday in effect until 3:45 p.m. for Franklin and Hampshire counties.

KHOU 11 Meteorologist Pat Cavlin says it's impossible to determine exactly where the heaviest of rain will fall, but everyone in risky areas should stay aware.

In the Midwest, quarter-sized hail and an isolated tornado cannot be ruled out, while in the South, flood alerts are in effect for areas that were devastated by flash floods last week.

The National Weather Service in Pueblo issued a flash flood warning Saturday evening for Costilla and Huerfano counties in southern Colorado. The impacted area is about 35 miles north of the New Mexico state line.