& Hazards Lab

Multihazards and Impact-based Forecasting
This research focuses on the development of robust, highly resolved gridded datasets of past extreme weather events to facilitate the quantification of trends in their intensities, durations, and frequencies, as well as their impacts. Combined with observational and modeled data on past losses, this work leads to a better understanding of the characteristics of impactful severe single- and multi-hazard weather events – such as extreme heat and heavy precipitation – and the probability of their occurrence. It also lays the foundation for the investigation of cascading hazards that can arise from the combination of one or more severe weather events which we believe will become invaluable to scientists, engineers, and emergency managers seeking to design effective mitigation and adaptation strategies at scales relevant to risks.
Relevant Publications
Quintal, H. C., Sebastian, A., Serre, M. L., Jäger, W. S., & de Ruiter, M. C. (2025). Covariance-informed spatiotemporal clustering improves the detection of hazardous weather events. EGUsphere, 2025, 1-35.
Sebastian, A., Juan, A., Bedient, P.B. (2022). Urban Flood Modeling: Perspectives, Challenges and Opportunities. In Coastal Flood Risk Reduction: Comparisons from the Netherlands and the U.S. Upper Texas Gulf Coast, S.D. Brody, Y. Lee, B.L.M. Kothuis (Eds.). Oxford: Elsevier, Inc. pp. 47-60.
​
Sebastian, A., Bader, D.J., Nederhoff, C.M., Leijnse, T.W., Bricker, J.D., Aarkinhof, S.G.J. (2021). Hindcast of pluvial, fluvial, and coastal flood damage in Houston, Texas during Hurricane
Sebastian, A., Gori, A., Blessing, R., van der Wiel, K., Bass, B. (2019) Disentangling the relative impacts of human and environmental change on catchment response during Hurricane Harvey. Environmental Research Letters, doi:10.1088/1748-9326/ab5234.
​
Van Oldenborgh, G. J., Van Der Wiel, K., Sebastian, A., Singh, R., Arrighi, J., Otto, F., ... & Cullen, H. (2017). Attribution of extreme rainfall from Hurricane Harvey, August 2017. Environmental Research Letters, 12(12), 124009.



