Spain is enduring an unprecedented heatwave, with June temperatures reaching levels not seen since records began in 1950. José Ángel Núñez of Aemet says the country may be experiencing its hottest June days in at least 75 years. Mainland Spain’s daily average temperatures reached 28.08°C on Monday and 28.17°C on Tuesday, the highest June daily averages in the national series dating back to 1950. Average minimum temperatures also reached 20.14°C on Monday and exceeded 19°C on Tuesday. The extreme conditions began on Sunday and are expected to persist until Thursday. The western and northern regions are likely to see relief before the Mediterranean coast. The episode formed part of a broader heatwave affecting much of Europe.
The impact is already severe. Data from MoMo show that a heat episode at the end of May resulted in 101 deaths, the highest toll for May since 2015. MoMo, Spain’s daily mortality-monitoring system, compares observed deaths with historical expectations. It uses weather information from the national meteorological agency, AEMET, to assess heat-related mortality. The system estimated that the June heatwave was linked to 212 deaths between Sunday and Wednesday. On Sunday alone, 86 climate zones were classified as facing medium or high health risks due to the heat. They cover 5,266 municipalities and nearly 21.9 million residents, or 46% of Spain’s population.
Authorities are particularly concerned that heatwaves are arriving earlier each year. Between 1975 and 2000, only two heatwaves were recorded in June. From 2000 to 2025, that number rose to ten, a fivefold increase. The shift signals a impressive change in Spain’s climate patterns, with direct consequences for public health and daily life. A separate epidemiological analysis later estimated 6,824 heat-related deaths in Spain during summer 2026, based on modeled mortality in 90 cities. Researchers attributed 77% of those deaths to human-caused climate warming. That estimate differs in scope from MoMo’s nationwide monitoring figures.
Underlying the current crisis is a steady rise in average temperatures. Since 1961, Spain’s mean temperature has increased by 1.75 degrees Celsius, a change attributed to the ongoing use of fossil fuels. AEMET-based reporting put the peninsula’s mean summer 2026 temperature at 24.5°C, 2.4°C above the 1991-2020 reference average and 0.3°C above the previous record set in 2025. The summer also brought a reported high of 44.4°C in some areas. MoMo later attributed 5,807 heat-related deaths to high temperatures across Spain from 15 May to 30 September 2026. This seasonal total reflects the cumulative burden of the summer, not deaths from the June episode alone. Together, these figures show how warming is increasing the risks associated with extreme heat.
Spain’s climate is classified as predominantly Mediterranean, with hot, dry summers and mild winters. In recent years, but, heatwaves have become more frequent and severe. The Spanish government has implemented public health alerts and recommends that residents, especially vulnerable groups, take precautions during periods of extreme heat. Residents are advised to stay hydrated and avoid outdoor activities during peak hours, while also monitoring local advisories. The current situation highlights the need for adaptation strategies as climate risks intensify across the Iberian Peninsula.
