Odds are increasing that 2016 will be the hottest year on the books, as April continued a remarkable streak of record-warm months.
Last month was rated as the warmest April on record by both NASA and the National Oceanic and Atmospheric Administration, which released their data this week. In the temperature annals kept by NOAA, it marked the 12th record warmest month in a row.
Global temperatures have been hovering around 1.5°C (2.7°F) above pre-industrial averages — a threshold that’s being considered by international negotiators as a new goal for limiting warming.
While an exceptionally strong El Niño has provided a boost to temperatures in recent months, the primary driver has been the heat that has built up from decades of unabated greenhouse gas emissions.