A heat dome is bringing extreme temperatures and humidity to southern states and warming the Gulf of Mexico. Here are six ...

USA TODAY analysis found that 90-plus heat index days are becoming more frequent, starting earlier, lasting longer and ...

Find out where it will be unusually hot, humid, wet and sunny — and what parts of the country might see drought intensify.

At its most basic: the heat index is what the temperature feels like when you're outside. The chart above shows the ...

Texas cities that could see temperatures climb within a few degrees of highest May temperatures ever recorded include San ...

Scientists from Manchester University have warned that rising temperatures could fuel the rapid global spread of Aspergillus, ...

Only two weeks are left of May and Houston has already broken a few heat records this month. How close could we get to ...

Volcanic ash from eruptions can reshape cirrus clouds, forming giant ice crystals and altering how Earth traps heat in the ...

An AccuWeather forecast map showed states in the "high" risk zone for Friday included parts of Kentucky, Illinois, and Indiana.

Athens is scrambling to mitigate perilously extreme summer temperatures as it juggles the needs of locals with the millions ...