More than 100 people are dead after heavy rainfall overwhelmed a river in central Texas. Here's what we know about Trump's trip to the area.

Straighter, smoother streams flow more violently than those that meander due to a reduction in friction. Areas with steeper terrain can see water accelerate downhill at a much faster rate causing a more destructive flash flood than flatter, open areas.

Texas. North Carolina. Illinois. New Mexico. Flash flooding has surged into the spotlight in the last week with record-breaking flood events occurring nearly back-to-back across the country. Here’s why they happened now and why floods are becoming more intense.

The threat of flash flooding returned to North Carolina on Thursday, only days after Tropical Depression Chantal dumped heavy rain across the central part of the state, flooding homes and highways and leading to dozens of rescues.

Gov. Greg Abbott wrote a letter Wednesday morning instructing flags on state property to immediately be lowered statewide.

Days after flash floods killed over 100 people during the July Fourth weekend, search-and-rescue teams are using heavy equipment to untangle and peel away layers of trees, unearth large rocks in riverbanks and move massive piles of debris that stretch for miles in the search for the missing people.

Kerrville city employees Rosa Ledesma and Alex Benitez talk with CNN’s Pamela Brown about how they received the call about the Texas flooding and jumped into action to save people.

North Carolina Gov. Josh Stein said July 8 that state officials were working to confirm the total number of fatalities.

Young campers and a dad saving his family were among the dozens killed in the historic flash floods that tore through central Texas over the holiday weekend.

The northbound and southbound lanes in one area of Interstate 93 reopened after they were shut down for less than an hour due to flooding caused by heavy rain on Thursday.

Significant rainfall caused flooding in yet another state as the National Weather Service issued a flash flood warning in Massachusetts Thursday.