World temperatures in September were "absolutely, gob-smackingly bananas," according to climatologist Zeke Hausfather.
Last month was 0.93 degrees Celsius warmer than the average September temperature between 1991 and 2020, and half a degree hotter than the previous record set in 2020. It puts 2023 firmly on track to be the warmest year on record.
Thomas Reuters foundation climate correspondent Jack Graham spoke to Ingrid Hipkiss.
