Evidence from 2024 Storm Boris indicates anthropogenic climate change amplifies floods more than extreme precipitation.

Anthropogenic climate change amplified flood peaks from Storm Boris in central Europe, reducing precipitation by 6–9% without human forcing but flood peaks by only 14–22%.

• Why it matters: Extreme precipitation is known to intensify under climate change, yet the human contribution to flood hazards is uncertain, limiting risk management and loss estimates.
• What they did: Using a storyline approach, nudged simulations from two climate models coupled with two hydrological models were run across hundreds of affected catchments.
• The result: Human forcing amplified flood peaks by a factor of 2.1 to 2.9 relative to the increase in event precipitation, implying precipitation-only attribution would substantially underestimate flood hazard amplification.