Record warm November continues the trend of a record hot 2015.
2015 marked the first time since recordkeeping began that the global average temperature climbed to more than 1°C (1.8°F) above pre-industrial levels.
Atmospheric CO2 has reached a concentration unseen for more than 400,000 years, up 33 percent in the last century.
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.
The unusual warmth that started this fall is extending into November.
Halloween comes during a time of year that has highly variable weather.
What we know about hurricanes and climate change.