Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 26, issue 8
Articles | Volume 26, issue 8
https://doi.org/10.5194/nhess-26-3749-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-3749-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 8
Research article
 | 
12 Aug 2026
Research article |  | 12 Aug 2026

Can aerosols improve urban flood forecasting? A case study of 2015 Chennai extreme event

Oscar Paul, N. Nithila Devi, Rakesh Teja Konduru, Soumendra Nath Kuiry, Kundan Lal Shrestha, and Chandan Sarangi

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Short summary
Despite computationally intensive high-resolution weather models, accurate spatio-temporal rainfall simulation at complex urban scales remains challenging. Using the December 2015 Chennai 1-in-100-year flood as a case study, we show that explicit aerosol representation significantly influences rainfall simulations, improving flood extent mapping by up to 50 %. Our approach resolves urban-scale aerosol microphysics and can be systematically extended to other extreme events across regions.
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