Earth's record monthly heat streak has hit 11 months in a row — a record in itself.
The National Oceanic and Atmospheric Administration announced overnight that March's average global temperature 12.7 Celsius was not only the hottest March, but continues a record streak that started last May.
According to NOAA climate scientist Jessica Blunden, the 11 heat records in a row smashes a streak of 10 set in 1944.
Climate scientists say this is a result of El Nino, along with relentless, man-made global warming.
Blunden and Michael Mann at the University of Pennsylvania worry that people will be desensitised to the drumbeat of broken records and will not realise the real affect they have on weather — for example, massive changes in what is supposed to be winter in the Arctic.
Greenland had a record early start for its ice sheet melting.
The Arctic had its smallest winter maximum for sea ice and it was the second smallest March snow cover for the Northern Hemisphere.
"It's becoming monotonous in a way," said Jason Furtado, a meteorology professor at the University of Oklahoma.
"It's absolutely disturbing ... We're losing critical elements of our climate system."