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This is the Globe’s Hottest Five-Year Period on Record

2015 will go down as the hottest year and a punctuation mark on the hottest five-year period on record.

Why 2015 Will Be the Hottest Year on Record

Increasing greenhouse gases are the overwhelming reason why 2015 will be the hottest year on record.

Thanksgiving Weather and Temperature Trends

Thanksgiving weather is variable from year to year, but Novembers are trending warmer across the U.S.

Global Warming Key Driver of 2015’s Record Heat

2015 is virtually certain to be the warmest year on record, with global warming driving that excess heat.

Conflict Makes Nations Vulnerable to Climate Impacts

Researchers have found that conflict makes people more vulnerable to climate impacts.

Is Your State Prepared for Climate Change?

Each state receives a conventional letter grade to illustrate its climate change preparedness overall and for five specific hazards: heat, dro…

Climate Matters: States At Risk

States at Risk: America’s Preparedness Report Card summarizes the changing nature of key threats and corresponding levels of preparedness in…

State-level Preparedness Report Cards

The first-ever national analysis of state level preparedness for climate-driven, weather-related threats in all 50 states.

U.S. Agencies Agree: October Was Crazy Warm

NOAA and NASA said October had the biggest temperature departure of any month in 100-plus years.

States At Risk: America’s Preparedness Report Card

The first-ever national analysis of state level preparedness for climate-driven, weather-related threats in all 50 states.

A Danger Days Update: Extreme Heat Still Surging

Warming temperatures are about to push U.S. cities into a new regime where danger days are more common.

Incredible October Warmth Guarantees Record Hot 2015

Incredible October global temperatures make it 99.9 percent certain that 2015 will be the hottest year on record.

One Graph Shows El Niño’s New Record

El Niño hit a weekly temperature record and is likely to keep upping the heat globally.

The Shum Show: Record Heat Across the Globe

There's record heat around the globe, and the globe as a whole is getting hot.

The Shum Show: East vs. West

Catch this week's topsy-turvy climate and weather news on the Shum Show.

8 Western States Have Warmest Year So Far

Eight western states have recorded their warmest year-to-date through October, and the Lower 48 could see a Top 10.

Attribution Studies Home in on Climate Change Signal

The role of climate change in extreme weather events is examined in an annual compilation of attribution studies.

Extreme Heat Is Defining Climate Change

The signal attributing extreme heat events to climate change is "very strong," according to new findings.

Climate Matters: Novembers Warming Across the U.S.

The nationwide average November temperature has risen 0.51°F per decade since 1970.

November Heating Up

The unusual warmth that started this fall is extending into November.


Keeling Curve Charles David Keeling's measurements provided the significant evidence of increasing atmospheric carbon dioxide concentration

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