Spain has registered 1,031 deaths attributed to high temperatures in June, marking a 153 percent increase compared to 407 deaths recorded in the same month last year, according to data from the Daily Mortality Monitoring System (MoMo) operated by Instituto de Salud Carlos III (ISCIII). This figure represents a record number of heat-related fatalities for June since the system began in 2015.
The closest previous figures were reported in June 2022 and 2017, with 828 and 1,000 deaths respectively. Additionally, these numbers follow a record set in May, when 122 deaths were linked to heat. Since the activation of the MoMo system on 13 May, alongside the Ministry of Health’s Heat Plan, the total estimated heat-related deaths have reached 1,153, compared with 415 for the same period in 2025.
The majority of June’s fatalities occurred in the last days of the month, with 25 June identified as the day with the highest death count at 120. Of those who died, 405 were men and 624 women. Most victims (1,022) were aged over 65, including 720 individuals over 85 years old.
Regional mortality figures and demographics
By autonomous communities, Catalonia recorded the highest number of heat-related deaths in June with 218, followed by the Basque Country with 147, Castilla y León at 96, Madrid with 92, and Galicia with 88. Other regions included Andalusia (72), Valencia Community (62), Navarra (53), Asturias (51), Cantabria (49), Aragón (45), Castilla-La Mancha (31), La Rioja (13), Extremadura (7), and Murcia (3).
In contrast, the MoMo system reported no fatalities linked to heat in the Balearics, Canary Islands, Ceuta, and Melilla during this period.