Planes have been grounded in Phoenix as life-threatening heat descends across the Southwest.
Deadly heat waves could impact half to 75 percent of the world's population if greenhouse gases aren't curtailed.
New NASA data shows this May was the second-hottest May on record.
See the trend in hot days in these U.S. cities.
A small increase in average temperature leads to a big increase in extreme heat.
This is how hot the United States could be in the future.
Even the modest rise in global temperatures to date have made India's already sweltering heat waves deadlier.
Warming waters are decreasing oxygen in the oceans, creating dead zones for marine plants and animals.
Excessive carbon emissions are worsening the ocean's health.
Summers are getting hotter across most of the country.
Extreme weather is estimated to cut production of major crops by 23 percent over the next 30 years.
Fossil fuels we burn affect warming in the Arctic, and solutions begin with understanding how and how much.
The first day with summer-like temperatures is happening earlier for most of these cities.
Northern tundra’s autumn carbon dioxide emissions increased 70 percent between 1975 and 2015.
Rising temperatures are causing less of each winter’s snowpack to flow down a major river as water.
After years of widespread, intense drought, the U.S. is experiencing its smallest drought footprint since 2000.
Through April, this year is the hottest on record for several Southern and Ohio Valley states.
The Arctic's astounding transformation continues with another record low month of sea ice.
For a record-setting 29 months in a row, there have been more record highs than lows.
Calculating the costs of natural disasters could be a valuable way to recognize the potential for damage.