The World Meteorological Organization (WMO) warned on Tuesday that Europe's heat wave could persist into the middle of next week, whereas the negative impacts of climate change are bound to continue at least until 2060s.
"The question that everybody is asking looking ahead is when this is going to end. Unfortunately, looking at all the models from our partners at a national and regional level, possibly not until the middle of next week," Robert Stefanski, chief of Applied Climate Services at the WMO, said at a joint press briefing with the World Health Organization (WHO).
According to Stefanski, the heat wave is already peaking in western Europe and is moving eastward, "but temperatures will still be much above normal."
At 11 a.m. local time on Tuesday, the United Kingdom (UK) recorded an all-time high temperature of 39.1 degrees Celsius, but a few hours later, the mercury rose above 40 degrees Celsius at London Heathrow, said WMO Secretary General Petteri Taalas.
"Record heat waves are becoming more frequent because of climate change," Taalas said, likening global warming to an athlete using performance enhancing substances.
"When sportsmen use such substances, the intensity of their performance increases. Similarly, we have been doping our atmosphere by injecting more and more greenhouse gases, especially carbon dioxide, into the atmosphere," said Taalas.
Besides human health, the WMO chief warned that the heat waves will also have a negative impact on agriculture, exacerbating the already huge loss of harvest due to the Russia-Ukraine conflict.
He said that intense heat waves could become annual occurrences in the coming decades, and that the negative impacts of climate change will continue at least until the 2060s "regardless of our success in climate mitigation."
The authorities in Hungary issued a Level 3 heat alert on Tuesday as the country is hit by a heat wave that has brought scorching temperatures to western Europe.
The alert is expected to remain in force until at least Saturday midnight. This is Hungary's second Level 3 heat alert this summer. The previous one was issued on June 27 and lasted three days.
In Hungary, a Level 3 (highest) heat alert is issued by the National Public Health Center (NNK) when the daily mean temperature exceeds 27 degrees Celsius for at least three consecutive days.
This summer has been unusually hot and dry in Hungary. The drought has damaged crops, wheat has to be harvested early and the cornfields are struggling to thrive without water.
The harvest is still going on in the country, but according to the latest estimates by the Hungarian Chamber of Agriculture, the yield can be more than 20 percent less than the normal output of five million tons of wheat and 6.5-8 million tons of corn.
The maximum daytime temperatures in Hungary are expected to peak on Thursday at around 40 degrees Celsius.
The heatwave also swept across the Netherlands on Tuesday, one of the hottest days since the Dutch measurements started in 1901.
The highest temperature of the day, 39.5 degrees, was measured in Maastricht, a city in the southern province of Limburg, according to the Royal Netherlands Meteorological Institute (KNMI). In the coastal province of Zeeland, temperatures rose to 39.1 degrees.
The National Institute for Public Health and the Environment (RIVM) activated the national heat plan for Monday and Tuesday, and issued a smog warning.
Extremely high temperatures were also recorded on Tuesday in Switzerland and much of southern France. In Italy, Wednesday will mark a "code red" state of emergency in nine cities. The warning, which means the heat could be life threatening, will impact cities including Rome, Florence, and Bologna. Italian officials warned residents and tourists to stay indoors during the hottest hours of the day.
The heat wave has also led to several fire disasters across Europe.
On Tuesday, a team of Croatian aerial firefighters joined their colleagues in Bosnia and Herzegovina (BiH) to help put out a fire that has been raging since Saturday on Cvrsnica Mountain, some 50 kilometers south of Sarajevo, said Ministry of Security of BiH.
It said the fire has not claimed lives, but has ravaged uninhabited mountainous areas near the municipalities of Konjic, Capljina and Citluk.
The Council of Ministers of BiH called for help on Monday, and Croatia responded by sending a Canadair plane, designed specifically for aerial firefighting. It joined the BiH Army's two helicopters that were unable to bring the fire under control due to the heat wave, high winds and inaccessible terrain. BiH and Croatia maintain a long-term agreement for mutual assistance in the event of natural disasters.
In another development, a massive wildfire broke out Tuesday in the northern suburbs of Greece's capital Athens, damaging houses and evicting residents in four communities at the foothills of Pentelikon mountain.
Fire Service spokesperson Ioannis Artopoios told a televised emergency press briefing that there were no reports of people trapped.