Extreme heat events have now become the new normal

Since the first day of 2023, extreme heat events have increased the threat to human health and the environment. Europe experienced the warmest New Year in history, with temperatures in some places reaching early summer levels. The highest temperature, of 25.1 Celsius, was recorded in Bilbao, Spain. In Glucholazy, Poland, the temperature at 4 am on Jan 1 was as high as 18.7 C, more than the local average minimum summer temperature. And while at least eight European countries experienced their hottest New Year's Day, more than 100 weather stations in France reported record-breaking temperatures.

Unlike gradual global warming which many people expect, extreme heat events have raised temperatures to historical highs in many places. On Jan 1 this year, temperatures in many places in France, Germany, Denmark and Latvia were exceptionally high. For example, the temperature in Berlin, Germany, was 16 C — normally, it hovers around 0 C during New Year.

According to the State of the Global Climate 2022 of the World Meteorological Organization, which was released on April 21, global temperatures in 2022 were 1.15 C higher compared with the pre-industrial levels from 1850 to 1900. Global warming is not a gradual and uniform process anymore; instead, it manifests through a succession of extreme heat events, continuously breaking high-temperature records worldwide.