Monday was hottest day ever measured by humans, beating Sunday, European science service says; "Uncharted territory"

Monday was the hottest day ever measured by humans, beating a record set the day before, as countries across the globe continue to feel the heat, according to the European climate change service.

Provisional satellite data published by Copernicus early Wednesday showed that Monday broke Sunday's mark by 0.1 degree Fahrenheit.

Climate scientists say the world is now as warm as it was 125,000 years ago because of human-caused climate change. While scientists can't be certain that Monday was the hottest day throughout that period, average temperatures haven't been this high since long before humans developed agriculture.