Articles | Volume 26, issue 6
https://doi.org/10.5194/nhess-26-2865-2026
https://doi.org/10.5194/nhess-26-2865-2026
Brief communication
 | 
16 Jun 2026
Brief communication |  | 16 Jun 2026

Brief communication: Drought economic assessments must include human health impacts

Alexandre Cunha Costa, Francisco Gildemir Ferreira da Silva, Rafaella Pessoa Moreira, Eduardo Sávio Passos Rodrigues Martins, Luewton Lemos Felício Agostinho, and Pieter Richard van Oel

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HESS Opinions: Drought impacts as failed prospects
Germano G. Ribeiro Neto, Sarra Kchouk, Lieke A. Melsen, Louise Cavalcante, David W. Walker, Art Dewulf, Alexandre C. Costa, Eduardo S. P. R. Martins, and Pieter R. van Oel
Hydrol. Earth Syst. Sci., 27, 4217–4225, https://doi.org/10.5194/hess-27-4217-2023,https://doi.org/10.5194/hess-27-4217-2023, 2023
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Cited articles

Costa, A. C., Cavalcante, T. F., de Oliveira, A. S. S., Lima Neto, I. E., Ribeiro Neto, G. G., van Oel, P. R., and Moreira, R. P.: Sharp decline of diarrhea hospitalizations despite historical drought in Brazil: The potential role of local water supply and public health measures, J. Water Health, 23, 743–756, https://doi.org/10.2166/wh.2025.392, 2025. 
De Sousa, T. C., Costa, A. C., Moreira, R. P., and van Oel, P. R.: Groundwater access reduces water insecurity and diarrhea hospitalizations in the drought-affected tropical drylands of Ceará, Brazil. Hydrogeol. J., https://doi.org/10.1007/s10040-025-02961-9, 2025. 
Fleming-Muñoz, D. A., Whitten, S., and Bonnett, G. D.: The economics of drought: A review of impacts and costs, Aust. J. Agr. Resour. Ec., 67, 501–523, https://doi.org/10.1111/1467-8489.12527, 2023. 
Instituto Brasileiro de Geografia e Estatística: Produto Interno Bruto – PIB, https://www.ibge.gov.br/explica/pib.php (last access: 1 December 2025), 2021. 
Ministério da Saúde: DATASUS – Sistema de Informações Hospitalares, https://datasus.saude.gov.br, last access: 2025. 
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Short summary
Many studies highlight drought impacts on productive sectors, such as agriculture and navigation, but economic consequences for human health remain understudied. We conducted an economic valuation of drought-related health interventions in Brazil, showing that ensuring groundwater access during severe droughts can avert substantial losses. Estimated benefits from reduced diarrhea hospitalizations total 9.92 % of local GDP (Gross Domestic Product), with avoidable losses reaching USD 1.15 billion at the state level.
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