Mars' Almost Perfect Sand Dune Circles

Now Playing

Mars' Almost Perfect Sand Dune Circles

Next Up

'They Were Littles,' Mom Says Of Texas Campers

How Did The Texas Flash Flood Event Happen?

Deadly Flash Flooding Hits Central Texas

Texas Rain Still Expected Amid Deadly Flooding

Catastrophic Floods Cause Deaths In Central Texas

Chantal, Third Named Storm In The Atlantic

Here’s Your July Temperature Outlook

Incredible Cloud Stuns Beachgoers

Massive Haboob Blots Out The Sun In New Mexico

Virga Storm Slams Las Vegas

What Meteorologists Watch For In July

Storm Chasers Stalk South Dakota Tornadoes

This Is Why You Don’t Shower During A Storm

Hidden Dangers Well Away From The Storm

Twister Rips Apart Grain Silos

These States Set All-Time June Heat Records

Torrential Rains Slam West Virginia Town

Millions Sweltering In Sprawling Heat Dome

Dangerous Heat Grips New York: How To Stay Safe

Extreme Heat Breaking Asphalt In South Dakota

Multiple Tornadoes Strike North Dakota

Lightning Bolts Strike Chicago Skyscrapers

Large Tornado Churns Next To A Rainbow

Cruise Ship Breaks Loose In Alaska