Map of location and type of extreme weather in 2014 from the Bulletin of the American Meteorological Society (BAMS).

A study from the end of 2015 found that human activities did in fact have an effect on several extreme weather events throughout the year of 2014. Follow the link for an article from NOAA on the report, a breakdown of extreme weather by continent, and for more information on the report itself.

New report finds human-caused climate change increased the severity of many extreme events in 2014