Flooding

One critical factor turned the heavy rainfall in Virginia and Washington D.C. into a flash flood emergency.

Here's why vast swaths of Nebraska, Missouri, and other Midwestern states are drowning.

Nebraska's rivers swell after a "bomb cyclone" hits the central U.S.

The underwater cave is otherworldy.

The highest high tides that come each year are rising with sea levels.

Hurricane Harvey, over the course of five days, dumped an unprecedented level of rainfall expected based on probabilities.

Rising floodwaters in southeast Texas could spell big trouble for an alligator sanctuary in Beaumont that houses more than 350 American alligators on its property.

Astronauts currently on the International Space Station have been sending well wishes to their colleagues on the ground as heavy rainfall and flooding from tropical storm Harvey continue.

Houston and other parts of southeast Texas are in the midst of historic flooding from Harvey, now a tropical storm, with heavy rain still expected to batter the region in the coming days.