ClimavisoWhat has been the biggest severe-weather episode in Spain since 2018?
AEMET data up to 26 October 2026. Averages for 2019–2025. Updated 26 October 2026.
Short answer
By warnings, August 2025 heatwave (3–18 August 2025): 141 warning zones reached orange or red, and adding up every zone there were 731 orange or red warning days, 58 of them red. It is measured in AEMET warnings, not damage.
| Episode | Dates | Zones at orange or red | Orange-or-red zone-days | |
|---|---|---|---|---|
| 1 | August 2025 heatwave: heat across much of Spain | 3–18 August 2025 | 141 | 731 |
| 2 | July 2022 heatwave: heat across much of Spain | 9–18 July 2022 | 118 | 535 |
| 3 | Heat across much of Spain | 1–16 July 2026 | 121 | 447 |
| 4 | August 2021 heatwave: heat in Andalucía, Castilla - La Mancha and elsewhere | 11–17 August 2021 | 122 | 370 |
| 5 | Storm Filomena: cold and snow across much of Spain | 6–15 January 2021 | 104 | 357 |
| 6 | Storms Daniel and Fabien: wind across much of Spain | 16–22 December 2019 | 126 | 306 |
| 7 | June 2025 heatwave: heat across much of Spain | 28 June – 5 July 2025 | 91 | 306 |
| 8 | August 2023 heatwave: heat across much of Spain | 20–27 August 2023 | 118 | 303 |
| 9 | August 2023 heatwave: heat across much of Spain | 6–13 August 2023 | 120 | 285 |
| 10 | August 2018 heatwave: heat across much of Spain | 1–9 August 2018 | 86 | 254 |
How it is counted
A warning day is a day on which AEMET had at least one yellow, orange or red warning in the zone; it counts once, at its highest level. Spain has 182 warning zones and every town gets the warnings of its own. Averages use the complete years 2019–2025; provinces and regions are the average of their zones. A warning is a forecast that a threshold will be crossed, not damage, and each zone has its own thresholds: these figures measure how often AEMET warns, not the climate or the risk to a building.
Related questions
- When was the last red warning in Spain?
- How many red warnings does AEMET issue in Spain each year?
- Which province of Spain has the most red warnings?
- All questions
How to cite
Climaviso (https://climaviso.com/en/questions/biggest-severe-weather-episode-in-spain/), from AEMET warning data. Authorised use of the information and its reproduction citing AEMET as its author.