Spain’s first heatwave of the summer, which began last Saturday, has resulted in 102 heat-related deaths, according to the System for Daily Monitoring of Mortality from All Causes (MoMo).
Record-Breaking June Temperatures and Rising Fatalities
The total number of deaths during June this year, which the State Meteorological Agency (Aemet) has declared the hottest June ever recorded in the country, reached 380, as reported by Spanish newspaper “Elmundo.”
MoMo data indicates that in the first half of 2025, a total of 2,168 deaths were linked to high and low temperatures. This figure represents 68% of the total temperature-related deaths recorded throughout all of 2024, when 3,521 such fatalities were reported.
June 2025 has been the month with the highest number of heat-stroke deaths, with Monday, June 30, being the deadliest day with 46 fatalities. Sunday, June 28, saw 32 deaths, a number identical to the entire month of June in 2024.
In contrast, June 2024 saw no heatwaves, and its average temperature was 19 degrees Celsius, making it one of the “cooler months” on the Iberian Peninsula since April 2022.
Demographics of Victims and Temperature Anomalies
The majority of deaths in June 2025 were among women (237), with most victims being over 65 years old, and citizens over 75 years particularly vulnerable.
According to Aemet, the average temperature in June this year was 23 degrees Celsius, which is 0.8 degrees higher than the previous record-breaking June in 2017. The increase compared to the average temperature for the 1991-2020 period was a significant 3.5 degrees Celsius.
June 2025 began with temperatures exceeding 43 degrees Celsius in several cities in southern Spain. The highest temperatures were recorded in the municipalities of Alconchel and Fuentes de Andalucía, where the mercury also hit 43 degrees Celsius.
