Over the last week of 2017 and first week of 2018, a cold wave gripped the northeastern U.S. and southeastern Canada, with temperatures over 18ºF (10ºC) colder than is typical at this time of year over this area, setting records at many sites.
Our scientific analysis found that human-caused climate change made the record rainfall that fell over Houston during Hurricane Harvey roughly three times more likely and 15 percent more intense.
The contiguous United States (CONUS) was exceedingly warm east of the Rockies in February 2017, and is notable as being the 27th month in a row with more record highs than lows.
Speculation about the cause of forecast record low temperatures in the US led WWA researchers to explore the cold air outbreak – how was it affected by greenhouse gas emissions?
Torrential rains drenched south Louisiana in mid August, with parts of the state receiving nearly 30 inches of rain between 10–17. The extreme nature of this event left many asking whether climate change may have played a role.