The analysis compiles daily temperature records for the United States since 1920, and shows the percentage of records in each decade that were hot or cold.
As we celebrate the 103rd birthday of the National Park Service, we examine the effect of climate change on our parks and update our earlier analysis of national park temperature trends.
The last five years have been the hottest five in recorded history
Take a look at how record high temperatures have compared to record lows in your city.
Summer minimum temperatures are warming fast across the U.S. — leading to added health risks and higher energy costs
Is the summer heat making it hard to sleep? Here’s how the summer minimum temperatures have been changing in your city.
As long as ozone season sticks around, so do concerns about the health risks of poor air quality. Check out where ozone is an issue across the country.
Ground-level ozone is a hazardous air pollutant and a key component of smog. Here’s how it forms.