NCA Backgrounder and Talking Points

The Third National Climate Assessment (NCA) was released on May 6, 2014 by the White House. The assessment documents how climate change impacts regions and sectors across the United States, and how society is responding to climate change.


South Central Mayan Express Floods

A “remarkably rare” storm of “unprecedented strength” dumped record amounts of rain in the south central US beginning Monday, March 7, and forecasters expect the deluge to continue through Saturday. Northern Louisiana has seen the worst impacts so far, with widespread 1-in-200 year rainfall with locations experiencing 1-in-1,000 year rains.


Snowmageddon Redux

Six years after the Snowmageddon of 2010 buried the Washington DC area in up to 30 inches of snow, another major winter storm is poised to unload upwards of 30 inches of snow in the US capital, while threatening the Atlantic seaboard with hurricane-level storm surge.

Climate change is fueling the destructive power of this storm. Global warming increases ocean heat content, which increases the energy and moisture available to storms. It also increases the heat in the atmosphere, allowing the air to hold and dump more precipitation, and it causes sea level rise, which allows storm surge to ride on higher seas.