Ocean surface temperatures have hit an all-time high this month, breaking every record since satellite measurements began in the 1980s.
Temperatures reached a global average of 69.98 Fahrenheit (21.1 degrees Celsius) in the first days of April. The previous record of 69.9 F (21 degrees C) was set in March 2016. Both are more than a degree higher than the global average between 1982 and 2011, which runs at around 68.72 F (20.4 C) in early spring, according to data from the University of Maine Climate Reanalyzer.
