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Heavy rainfall associated with floods in southeastern Brazil in November–December 2021

Author

Listed:
  • Jose A. Marengo

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Marcelo E. Seluchi

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Ana Paula Cunha

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Luz Adriana Cuartas

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Demerval Goncalves

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Vinicius B. Sperling

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Andrea M. Ramos

    (National Institute of Meteorology)

  • Giovanni Dolif

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Silvia Saito

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Fabiani Bender

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Tarcio Rocha Lopes

    (Maringá State University)

  • Regina C. Alvala

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

  • Osvaldo L. Moraes

    (Brazilian National Center for Monitoring and Early Warning of Natural Disasters)

Abstract

In southeast Brazil, heavy precipitation events during the summer trigger floods. These disasters are responsible for most loss of lives. In November and December 2021, the northern area of Minas Gerais and the southern part of Bahia were affected by periods of very heavy rain and intense floods. Heavy precipitation contributed to unusually high soil saturation that favored floods that claimed lives. Estimated losses totaled about $3.1 billion U.S. dollars from November to December 2021. Therefore, this study: 1. evaluates the meteorological conditions in November–December 2021, in particular from December 22 to 29, when it rained up to 300 mm above average in this region, 2. analyzes the floods, exacerbated by extreme rainfall events earlier in November and December, and 3. discusses monitoring and issuing risk alerts of these disasters by government agencies that helped minimize damage and property loss and reduce fatalities.

Suggested Citation

  • Jose A. Marengo & Marcelo E. Seluchi & Ana Paula Cunha & Luz Adriana Cuartas & Demerval Goncalves & Vinicius B. Sperling & Andrea M. Ramos & Giovanni Dolif & Silvia Saito & Fabiani Bender & Tarcio Roc, 2023. "Heavy rainfall associated with floods in southeastern Brazil in November–December 2021," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 116(3), pages 3617-3644, April.
    • Handle: RePEc:spr:nathaz:v:116:y:2023:i:3:d:10.1007_s11069-023-05827-z
    DOI: 10.1007/s11069-023-05827-z
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    References listed on IDEAS

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    1. Xuebin Zhang & Lisa Alexander & Gabriele C. Hegerl & Philip Jones & Albert Klein Tank & Thomas C. Peterson & Blair Trewin & Francis W. Zwiers, 2011. "Indices for monitoring changes in extremes based on daily temperature and precipitation data," Wiley Interdisciplinary Reviews: Climate Change, John Wiley & Sons, vol. 2(6), pages 851-870, November.
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