Spain experienced an unusually early and intense heatwave in May 2026, which, according to official data, led to a record number of heat-related deaths. Health authorities describe it as the deadliest May ever recorded in terms of heat-related mortality since records began.
Spain Expat Press Editorial Team
by Marlon Gallego Bosbach
Record figures for a spring month
According to the relevant health authorities, a total of 101 heat-related deaths were recorded in May 2026. This figure is significantly above the long-term average and represents the highest ever recorded value for this month.
Compared to the past ten years, the number of deaths is more than three times higher, specifically around 3.6 times above the average. Experts see this as a clear warning sign of the growing health burden caused by extreme temperatures, even outside the traditional summer months.
Extreme heat already in spring
What is particularly unusual about the current heatwave is its early timing. Already in May, temperatures close to or even above 40 degrees Celsius were recorded in several regions of Spain. As a result, the period of extreme heat began significantly earlier than usual.
Meteorologists describe it as a rare combination of stable high-pressure systems and intense solar radiation, which led to a prolonged period of warming. Both inland areas and coastal regions were affected, with the impact on the population being felt across the country.
Health risks increase significantly
Experts warn that early heatwaves are particularly dangerous, as the human body is not yet adapted to extreme temperatures after winter, making the strain significantly greater. In addition, several unfavourable factors further worsen the situation, including consecutive hot days without nighttime cooling, high humidity in some regions, and limited cooling options in older buildings.
Health authorities therefore stress that even moderate increases in temperature under such conditions can lead to a significant rise in mortality.
Particularly vulnerable groups
As with previous heatwaves, older people were the most severely affected. The majority of deaths were recorded among those over the age of 75. People with chronic illnesses, as well as those living alone without adequate cooling, are also considered particularly at risk.
Experts also warn that social isolation during heat periods is an additional risk factor, as help often arrives too late.
Part of a larger climate trend
Meteorologists and climate researchers do not see the current development as an isolated case. Rather, it fits into a pattern of increasingly early, longer, and more intense heatwaves across Europe.
Spain is among the countries most affected. In recent years, extreme temperatures have been recorded more and more frequently in spring and autumn—periods that were previously considered relatively mild.
