| Type | Heatwave |
|---|---|
| Areas | |
| Start date | 22 May 2026 |
| Peak temp. | 40.3 °C (104.5 °F), recordedat Mora, Portugal on 27 May 2026 |
| Losses | |
| Deaths | 11 |
Starting in late May, parts of Europe have been affected by heatwaves, breaking records in Spain, the United Kingdom, Germany, France, and Ireland. [1] The first of these, starting on 24 May, was a historic record-shattering heatwave that resulted in temperatures of 10 to 15 degrees Celsius higher than normal, causing deaths and breaking all-time records for highest May and springtime temperatures across the affected areas. [2] [3] Climate change has been cited as a contributing factor to the earlier onset of summer. [4] Western Europe is the most affected area, with reports of record breaking temperatures occurring in France, [5] [6] the United Kingdom and Ireland. The onset of these heatwaves closely mirrors the timing of the onset of the 2025 European heatwaves, with the first major heatwave occurring on May 22, [7] six days before the 2025 European heatwaves began. Other countries experiencing irregularly high temperatures are Portugal reaching 40 degrees Celsius, Spain expected to reach 38 degrees. [8]
On 25 May, the highest spring time temperature ever recorded in Great Britain was recorded in Kew Gardens at 34.8 °C (94.6 °F), exceeding the previous record by two degrees. [9] [10] [11] The next day on 26 May, the previous day's record was broken again at Kew Gardens with a reading of 35.1 °C (95.2 °F). [12] [13] The heatwave has led to recorded 34.3 °C (93.7 °F) temperatures onboard London Underground trains and stations, [14] and at least 15 people died in water-related incidents across the country. [15]
Portugal faced the threat of 42 °C (108 °F) high temperatures with yellow weather warnings issued initially only in the districts of Leiria, Lisboa, Santarém, Setúbal, Portalegre, Évora, and Beja, before being expanded to all districts in Portugal except for Faro district for significant public health and "very high" wildfire risks. [16] [17] [18] Continental Portugal experienced nearly nation-wide tropical nights, meaning that the daily low temperature was above 20 degrees Celsius from the Alentejo to the Algarve. [19] [20] [21] Mora recorded a temperature of 40.3 °C (104.5 °F) on 27 May, setting the hottest May record on nationally. In addition, 22 stations recorded the highest maximum-temperature on record, with one on 26 May and the rest on 27 May. [22]
Temperatures in Spain began to rise starting on 19 May. By 28 May, the Santander Airport recorded six days with temperatures higher than 30 °C (86 °F). Before then, only two days prior to June recorded temperatures of over 30 °C (86 °F). In addition, the Badajoz Airport had temperatures over 38 °C (100 °F) for the first time in May. Temperatures across the southwestern quadrant of Spain recorded highs of 37–39 °C (99–102 °F). [23] Vinebre recorded a temperature of 39.5 °C (103.1 °F), setting the hottest May temperature ever recorded in Catalonia. [24] The Health Ministry recorded 101 heat-related deaths in May, the highest ever recorded for the month of May since records began in 2015. [25]
In France, there were reports of record-breaking temperatures. [26] The national average was 24.9 °C (76.8 °F) on 26 May, the hottest May on record. The heat dome continued to bring hot temperatures with Angoulême-La Couronne recording a temperature of 37.8 °C (100.0 °F) on 28 May. [27] Seven heat-related deaths occurred. [28] [27]
Ireland saw its highest May temperature on record, with both Clonmel and Killarney recording 28.8 °C (83.8 °F), beating the previous May record of 28.4 °C (83.1 °F) in Kerry in 1997, with even higher temperatures expected. [29] On 26 May, Shannon Airport in County Clare recorded a temperature of 30.6 °C (87.1 °F). [30] The Irish weather office Met Éireann reported that the temperature in south Ireland is five standard deviations over the May average. [31]
The Netherlands recorded its hottest 26 May, with a station in De Bilt recording 30.4 °C (86.7 °F), beating the previous record of 29.1 °C (84.4 °F) in 2005. On that day as well, the first regional heatwave of the year was recorded. The temperature in Ell reached 30.7 °C (87.3 °F). [32]
Between 23–25 May, Uccle recorded temperatures of over 28 °C (82 °F). Locally in Brussels, temperatures peaked 31 °C (88 °F) on 25 May. [33] On 26 May, Uccle broke the daily temperature record set on 1985 and peaked at 30.3 °C (86.5 °F). [34]
May high-temperature records were set in several stations run by the Rural Economy and Agriculture Authority on 26 May, though none beat the all-time May record. [35]
Temperatures rose above 30 °C (86 °F) for the first time in 2026 on 23 May. [36] Increased cooling demands from the heatwave combined with the usage of more expensive power sources due to lower wind power generation caused day-ahead power prices to jump by 29% on 27 May. [37]
Many weather stations recorded new records for the number of hot days (>30°C) this May, especially in the southern half of the country. In the Upper Rhine region, 6 to 7 hot days were recorded locally. Wutöschingen-Ofteringen, Baden-Württemberg recorded 9 hot days this May, more than double the previous record (4 hot days) set in May 2005. [38] The highest temperature recorded in Germany in May 2026 was 34°C recorded in Regensburg, Bavaria on 26 May. [39]
The unusually early heatwave set new daily highs in many stations in the latter part of May. [40] The 0 °C (32 °F) isotherm rose to 4,328 m (14,199 ft) on 25 May, the third highest recorded in May. [41] Biasca recorded 34.8 °C (94.6 °F) on 28 May, just 0.3 °C (0.54 °F) below the May national record and the highest May temperature ever recorded on the southern side of the Alps. [40] Overall, the month of May was 1.8 °C (3.2 °F) above average and the fourth hottest on record. [40] [42]
Red alert warnings were issued for Rome, Florence, Bologna, Brescia, and Turin on 28 May. Temperatures reached 32 °C (90 °F) outside the Colosseum. [43] The thermal stress to the cables in the local grid led to repeated blackouts in Turin. [44]
In May, 46 GeoSphere Austria stations set new temperature records. Of those, Lienz had the highest temperature, recording 33.3 °C (91.9 °F) on 26 May. The city also had a record eight hot days in May, which are days with a temperature of at least 30 °C (86 °F), beating the record of three set in 2001. Bregenz and Eisenstadt had set the new record highest number of hot days in May as well. Additionally, May had significantly below average rainfall, with some regions being between half to two-thirds below the 1991-2020 average. May was also the fifth sunniest on record. [45]
On 18 June, GeoSphere Austria announced that a heatwave was about to affect the country, with temperature highs between 30 °C (86 °F) and 36 °C (97 °F) expected to continue until the end of the month. [46]
Between 25 and 27 May, the Slovenian Environment Agency (ARSO) recorded temperatures above 30 °C (86 °F) at several stations in its network, reaching as high as 33.5 °C (92.3 °F) at Cerklje ob Krki Airport on 27 May. [47]
On 18 June, ARSO announced that it expected temperature highs between 30 °C (86 °F) and 35 °C (95 °F) to continue until the end of the month, thus marking the beginning of the first heatwave to affect Slovenia in 2026, in accordance with the agency's definition of a heatwave as a period of time when average temperatures of at least 24 °C (75 °F) in central and eastern Slovenia or 25 °C (77 °F) in western Slovenia, respectively, are recorded on three consecutive days. [48]
it was reported that the Danubian Plain are edging towards 38°C [49]
