Each of the National Parks faces unique challenges from climate change, including increased heat.
The monthly variability in the number of tornadoes has been increasing over the past 50 years.
Allergy season is getting longer and worse in a warming world with more carbon dioxide.
Increasing greenhouse gases are the overwhelming reason why 2015 will be the hottest year on record.
The first-ever national analysis of state level preparedness for climate-driven, weather-related threats in all 50 states.
What we know about hurricanes and climate change.
Global average temperatures are generally higher in El Niño years vs. La Niña years.
Summer seems to have lasted a little longer in much of the country this year.