Understanding Climate

High-tide "nuisance flooding" has increased between 300 and 925 percent since the 1960s as a result of sea level rise. In this Q&A, Billy Sweet and John Marra explain the changes and offer projections for the remainder of the 2015-16 monitoring year.

September 2012

  • A scorching July contributed to the third hottest summer on record for the contiguous United States. Most of the U.S. was also drier than average. Rains from Isaac did little to relieve drought.