Overview
- The peer-reviewed analysis in Nature Communications attributes about a 21% increase in peak hourly rain rates, a 56% expansion of the area surpassing 180 mm, and a 19% rise in total precipitation over the Júcar basin compared with a preindustrial climate.
- Warmer sea-surface temperatures loaded the atmosphere with more water vapor, strengthening updrafts and altering microphysics, including higher hail concentrations, which together boosted rainfall intensity.
- The team applied a Pseudo-Global Warming framework with 1 km convective WRF simulations and a climate-change signal derived from 15 CMIP6 models to isolate the anthropogenic contribution.
- Context for the impact includes reported records of 184.6 mm in one hour and 771.8 mm in under two days, with news reports citing about 230 deaths from the October 2024 flooding.
- Independent experts call for updating IDF curves, drainage design, and flood maps to reflect future-climate risks, while urging further research on changes in event frequency and atmospheric pathways.