Overview

• The 16-day episode carried a 4.6 °C anomaly and included 8–17 August, the warmest ten-day run recorded in Spain since at least 1950.
• National mortality monitoring (MoMo) estimates 1,149 excess deaths linked to the heat between 3 and 18 August.
• Wildfires stoked by the prolonged heat have burned roughly 400,000 hectares in Spain, with major incidents still reported in several regions.
• AEMET data show five of the six heat waves with anomalies of 4 °C or more have occurred since 2019, indicating rising intensity and duration.
• A WWA–Climate Central–Red Cross analysis finds Spain experienced about 48 extreme-heat days from May 2024 to May 2025 versus 18 in a non-warmed world, part of a global pattern affecting roughly 4 billion people.