And why do they help create fire conditions?

WEATHER
Bad weather can wreak terrible destruction—but it can also uncover amazing treasures.
Even a Category 4 storm is no match for the beloved restaurant chain.
If you've considered adopting a pet, now's the time.
Wildfires and other natural disasters can cause pets to panic and get stressed out, but these emergency preparedness tips can help you keep them safe.
A map of the U.S. showing the warmest day of the year by location was created using climate data from the National Centers for Environmental Information.
Surveyors are taking advantage of the uncharacteristic weather.
High temperatures really do make your brain feel fried.
It's not quite 'Twister,' but it's close.
With clouds, gravity pulls the water droplets out of the sky, and then they fall as rain. Here's why it rains.
The Water-Gate creates a flood barrier when the waters rise.
The tropical flora could one day be a common sight at higher latitudes.
The $13 gloves used thermochromic ink to make images "appear" when the temperature dropped below 40 degrees.