Over the weekend, NASA announced that last month was the warmest September since global records have been kept. What’s more, the last six months were collectively the warmest middle half of the year in NASA’s records—dating back to 1880.

The record-breaking burst of warmth was kicked off by an exceptionally warm April—the first month in at least 800,000 years that atmospheric carbon dioxide reached 400 parts per million.

According to the National Climatic Data Center, which keeps a separate record of global temperatures, this April ranked as the warmest April on record. Followed by the warmest May on record. Followed by warmest June on record. (July wasn’t quite as hot—just the fourth-warmest July on record.) But August—again, you guessed it—was the warmest August on record. The NCDC will release its numbers for September later this month.

http://www.slate.com/blogs/future_tense/2014/10/13/nasa_earth_just_experienced_the_warmest_six_month_stretch_ever.html?wpsrc=fol_tw