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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/nhess-2018-193
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2018-193
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 09 Jul 2018

Research article | 09 Jul 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Multi-hazards risks in New York City

Yaella Depietri1, Khila Dahal1, and Timon McPhearson1,2,3 Yaella Depietri et al.
  • 1Urban Systems Lab, The New School, New York, NY, USA
  • 2Cary Institute of Ecosystem Studies, Millbrook, New York, USA
  • 3Stockholm Resilience Centre, Stockholm University, Stockholm, Sweden

Abstract. Megacities are predominantly concentrated along the coast and are greatly exposed to natural hazards. Generally, the assessment of risk to climatic hazards does not yet fully capture the multiple interactions that occur in these complex urban systems. We analyze the risk of New York City as an example of a coastal megacity exposed to multiple hazards which overlap spatially and, in some cases, temporally. The aim is to identify hotspots of multi-hazard risk to support the prioritization of adaptation strategies. We used socio-economic indicators to assess vulnerabilities and risks to three climate related hazards (heat stress, inland flooding and coastal flooding) at high spatial resolution. The analysis incorporates local experts' opinions to identify sources of multi-hazard risk and to weight indicators used in the risk assessment. Results show spatial hotspots of multi-hazard risk principally located in coastal areas. We conclude that New York City is exposed to multiple hazards that interact spatially and temporally and that the city should prioritize adaptation in its coastal areas while considering possible synergies or tradeoffs adapting to spatially overlapping hazards.

Yaella Depietri et al.
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Yaella Depietri et al.
Yaella Depietri et al.
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Short summary
Megacities are often located along the coasts and are greatly exposed to multiple climatic hazards. We take New York City as an example of a coastal megacity highly affected by heat waves, inland flooding and coastal flooding. These hazards overlap spatially or temporally in the city. We develop a multi-hazard maps of risk to identify hotspots of risk and prioritize adaptation strategies. We find that New York should prioritize adapting coastal areas while considering synergies and tradeoffs.
Megacities are often located along the coasts and are greatly exposed to multiple climatic...
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