Across much of the world, hotter days are no longer arriving alone. The air itself is changing, sometimes turning from dry ...

Heat waves are becoming commonplace, and so too is high humidity, which can strain the electrical grid, hurt the economy, and ...

Bolted into a concrete slab in a grassy field in Colesville, a 30-foot-tall metal tower with devices to measure weather ...

A new leaf imaging system lets scientists watch plant stomata control water loss and carbon uptake in real time.

Stability studies measure how medical devices respond to environmental stresses such as temperature, humidity, light, and ...

A red flag warning means that “critical fire conditions” are occurring that could turn a spark into an unchecked wildfire or ...

Looking for a reliable home weather station that fits your needs? We tested a range of weather stations to see how well they ...

Winter brings a shift in indoor air dynamics. Homes are sealed tightly against the cold, heaters or fireplaces blast dry air, and outdoor pollution often seeps inside. In cities like Delhi-NCR, where ...

NORFOLK, Va. — Most summer days, you hear us talk about “humidity” when describing how the air feels. While many people are familiar with the term relative humidity — the percentage of water vapor in ...

A lifeguard watches swimmers cooling off at a St. Louis-area pool. Summer afternoon temperatures have cooled off in the middle of the country in recent decades. But hotter nights and winters are still ...

More than 70 million Americans sweated through the muggiest first two months of summer on record as climate change has noticeably dialed up the Eastern United States’ humidity in recent decades, an ...