Europe has many sizeable countries with expansive topographical features to match. Here are the biggest organized from least to most square mileage.

Explore the Missouri River: its map, amazing history, why it's called 'Big Muddy,' and key facts about North America's longest river.

After a day of catastrophic floods along the Guadalupe River, Texas officials issued alerts for regions around the San Gabriel River on Saturday ...

The Texas Hill Country has been notorious for flash floods caused by the Guadalupe River. Here's why the area is called "Flash Flood Alley." ...

Flooding caused by the overflowing Guadalupe River has prompted widespread evacuations in Kerrville and surrounding areas of Kerr County, Texas.

Multiple parts of Central Texas, including Kerr County, were shocked by flash floods Friday when the Guadalupe River and others rose rapidly.

Many of the publicly-owned properties along the San Joaquin River are closed, but there are a number of places where you can legally enjoy the water.

Traffic on the Don River in the Kalachevsky district of Russia's Volgograd region was temporarily restricted to eliminate wreckage from a "massive" Ukrainian drone attack, the regional governor's ...

At least 120 people, including more than two dozen children, died in the torrential downpour. Many remain missing in the hardest-hit county.

View the latest weather forecasts, maps, news and alerts on Yahoo Weather. Find local weather forecasts for Toms River, United States throughout the world ...