In August 2025, Spain experienced the strongest heatwave since the beginning of meteorological records. According to the national meteorological service, temperature anomalies reached 4.6 degrees above average, surpassing the previous record set in July 2022.
The heat persisted for sixteen consecutive days, significantly increasing the impact of extreme temperatures on the population and the environment. During this period, not only were record daytime highs recorded, but unusually high nighttime temperatures as well, which posed a particular health risk to vulnerable groups.
Statistics show that since 1975, there have been 77 heatwaves recorded in mainland Spain and the Balearic Islands. Of these, six were accompanied by temperature anomalies exceeding 4 degrees, with five such events occurring in the past six years. This trend indicates a marked increase in extreme weather events linked to global climate change.
The first twenty days of August 2025 were the hottest on record in Spain. From August 8 to 17, the country experienced a ten-day period with the highest average daily temperatures since 1950. Meteorologists note that such prolonged heatwaves increase health risks, especially for the elderly, children, and people with chronic illnesses, and contribute to a rise in wildfires.
Preliminary estimates suggest that August 2025 will rank among the four warmest months on record. Four out of the five hottest Augusts have occurred in the last four years, confirming a persistent warming trend. Summer 2025 is expected to be one of the two hottest, nearly matching the 2022 summer and surpassing the figures recorded in 2003.
Experts emphasize that the increasing frequency and intensity of heatwaves are linked to climate change. Analysis of temperature trends shows that these phenomena are becoming more common not only in Spain but across the Mediterranean. International climate organizations predict that by mid-century, summer temperatures in the region will be about 2 degrees higher than during the period from 1981 to 2020. Already, the figures for 2022 and 2025 align with these forecasts.
Meteorologists note that, with a few exceptions, almost the entire year 2025 has been unusually warm. From January to August, this year ranks second in terms of average temperatures, surpassed only by 2024. The past four years stand out as the hottest in Spain’s recorded history.
In light of this, experts are calling for the active implementation of adaptation and mitigation measures in response to climate change. Particular attention is given to protecting public health, preventing forest fires, and preparing infrastructure for new climate realities.
