Data from ancient ice cores and tree rings suggest the world hasn't been this warm in 100,000 years.
But climate scientists who track these trends were still shocked by how high temperatures soared.
Europe's Copernicus Climate Change Service made the official call this week.
Carlo Buontempo, the service's director, said evidence suggests the world hasn't been this warm in 100,000 years, meaning no cities, farms, or other parts of modern society have ever endured this heat.
AdvertisementBut the Copernicus climate scientists said that these weren't the only factors and that some required more research.
Persons:
Carlo Buontempo, Buontempo, Copernicus, El Niño, Niño, Samantha Burgess, Burgess
Organizations:
Service, UN
Locations:
Business, Munich, Tonga, Paris