The frequency and duration of extreme events are increasing, significantly impacting Euskadi's climate. In recent years, the start of heatwaves has advanced by four days per decade, leading to a longer warm season.
Official data shows that temperatures in Euskadi have risen by 0.3°C per decade since 1970. The duration of heatwaves has doubled, from 4 days in the 1970-2000 period to nearly 9 days in the 2014-2023 period.
Climate projections indicate that in the coming decades, the number of days with temperatures above 35°C will multiply across the territory. In Bizkaia and Gipuzkoa, this will increase from 3-4 days annually to about 16-17 days by the end of the century; in Araba, from approximately 4 days to over 20 days per year.
Researchers emphasize that the impact of heatwaves is measured not only by high temperatures but also by their effect on human health. According to studies, an estimated 168 deaths attributable to heat have been recorded in Spain since May 15th, with 83% of these concentrated in Asturias, Galicia, and Euskadi.
Studies analyzing 213 historical heatwaves worldwide conclude they were more probable and intense due to global warming. Furthermore, historical emissions from major fossil fuel producers account for half of the increase in heatwave intensity.
Scientists warn that the planet's global warming is human-caused, leading to an increase in the frequency and intensity of extreme climate events.
