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Climate change intensified Valencia’s 2024 flash flood rainfall

A flooded residential street in an urban area with buildings partially submerged in water, overcast sky, and utility poles visible, showing the aftermath or ongoing severe weather event.
Research area:Earth and Planetary SciencesGlobal and Planetary ChangeFlood Risk Assessment and Management

What the study found

Human-induced climate change appears to have intensified the rainfall associated with Valencia’s 2024 flash flood. The study reports higher 1-hour rainfall intensity under present-day conditions and larger rainfall totals and affected area than in a pre-industrial scenario.

Why the authors say this matters

The authors conclude that these findings suggest anthropogenic climate change could intensify flash floods in the Western Mediterranean region. They also state that the results highlight the need for effective adaptation strategies and improved urban planning to reduce risks from hydrometeorological extremes.

What the researchers tested

The researchers carried out a physical-based attribution study using a kilometer-scale pseudo-global warming storyline approach. They compared present-day conditions with a pre-industrial era scenario to assess the contribution of anthropogenic climate change to the October 2024 Valencia event.

What worked and what didn't

Present-day conditions led to a 20% °C⁻¹ increase in 1-hour rainfall intensity, which the authors say exceeded Clausius-Clapeyron scaling, a rule describing how atmospheric moisture rises with temperature. They report a 21% increase in the 6-hour rainfall rate, a 55% increase in the area with total rainfall above 180 mm, and a 19% increase in total rain volume within the Jucar River catchment compared with the pre-industrial era.

What to keep in mind

The abstract does not describe limitations beyond the study’s focus on this specific event and region. It also notes that the results come from a storyline attribution approach for the Valencia case, so the findings are presented for this particular flood event.

Key points

  • The study attributes intensified Valencia flood rainfall to human-induced climate change.
  • Present-day conditions increased 1-hour rainfall intensity by 20% °C⁻¹.
  • The area with total rainfall above 180 mm was 55% larger under present-day conditions.
  • Total rain volume in the Jucar River catchment increased by 19% compared with the pre-industrial era.
  • The authors say the findings point to greater flash-flood risk in the Western Mediterranean region.

Disclosure

Research title:
Climate change intensified Valencia’s 2024 flash flood rainfall
Authors:
Carlos Calvo‐Sancho, Javier Díaz-Fernández, Juan Jesús González-Alemán, Amar Halifa‐Marín, M. Miglietta, Cesar Azorin-Molina, Andreas F. Prein, Ana Montoro-Mendoza, Pedro Bolgiani, Ana Morata, María Luisa Martín
Institutions:
Universidad de Valladolid, Centre d'Investigacions sobre Desertificació, Agencia Estatal de Meteorología, Consejo Superior de Investigaciones Científicas, Universidad de Zaragoza, Instituto Pirenaico de Ecología, Institute of Atmospheric Sciences and Climate, National Research Council, ETH Zurich, Instituto de Geociencias, Universidad Complutense de Madrid
Publication date:
2026-02-17
DOI:
10.1038/s41467-026-68929-9
OpenAlex record:
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AI provenance: This post was generated by OpenAI. The original authors did not write or review this post.

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