Footage from a camera operated by the U.S. Geological Survey shows a timelapse of just how fast New Mexico's Rio Ruidoso rose, causing flash flooding.

Up to 18 inches of rain fell between Aug. 18 and Aug. 20, 2007, triggering flash floods that are still considered some of Minnesota's worst. It killed seven people and caused $179 million in damages, mostly in Winona, Fillmore and Houston counties.

Flash flooding hit a New Mexico town devastated by wildfires last year, washing away at least one home and causing gas leaks, city officials said Tuesday.

At least 110 people are dead and dozens are still missing after devastating flash floods slammed Texas Hill Country, with water rescues taking place along the Guadalupe River, which rose rapidly early Friday morning to the height of a two-story building.

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