Risk Assessment and Impact of Floods on the Transmission of Vector Borne Diseases

  • SN Sharma National Centre for Disease Control, 22 Sham Nath Marg, Delhi, India.
  • Rina Kumawat National Centre for Disease Control, 22 Sham Nath Marg, Delhi, India
  • SK Singh National Centre for Disease Control, 22 Sham Nath Marg, Delhi, India.
Keywords: Climate Sensitive VBDs, Vulnerable, Risk Assessment, Preparedness, Response


Floods are the result of natural disasters in an area due to prolonged continued and heavy rains and are frequently followed by a proliferation of mosquitoes due to the creation of a large number of breeding
habitats. In the endemic zones for VBDs, vector mosquito species require special attention for planning immediate control measures as these areas may pose a threat to public health. Natural disasters continue to
strike unabated, flash floods due to heavy rains, riverine floods, coastal floods and cloud burst floods. In general, floods are witnessed due to the concentrated spells of heavy rains during the monsoon months
and seasonal disturbances. The low lying areas are submerged under water and remain water logged for a long duration. Slowly, the low lying water bodies thus created after receding of flood water, act as a
breeding potential source for the vector mosquitoes. Some of the areas receive water from flushing of water from high altitude areas due to heavy rains or melting of ice. There is definite need for public health
preparedness and response for the flood affected areas to reduce the transmission of VBDs with proper risk assessment. There are chances for the onset of transmission of VBDs to the population shifted to
temporary shelter homes away from homes. Given the situation with the presence of congenial conditions owing to presence of favourable climatic variables for propagation of vectors, pathogens and susceptible
population, there are chances of disease outbreaks. Therefore, the risk assessment of the flood affected area with the vulnerable population is essential to make preparedness and response to any onset of VBDs
transmission. Disease and vector surveillance are the key elements to be in place for such flood affected areas during and after the floods.

How to cite this article:
Sharma SN, Kumawat R, Singh SK. Risk Assessment and Impact of Floods on the Transmission of Vector Borne Diseases. J Commun Dis. 2022;54(3):15-21.

DOI: https://doi.org/10.24321/0019.5138.202284


Paterson DL, Wright H, Harris PNA. Health risks of flood disasters. Clin Infect Dis 2018;67:1450-4. [PubMed]

[Google Scholar]

Du W, FitzGerald GJ, Clark M, Hou XY. Health impacts of floods. Prehosp Disaster Med. 2010;25:265-72.

[PubMed] [Google Scholar]

EM-DAT: The emergency events database. Université Catholique de Louvain. Available from: www.emdat.

be. Accessed 3 September 2017.

Milojevic A, Armstrong B, Hashizume M, McAllister K, Faruque A, Yunus M, Kim Streatfield P, Moji K, Wilkinson

P. Health effects of flooding in rural Bangladesh. Epidemiology. 2012 Jan;23:107- 15. [PubMed] [Google


WHO. Flooding and communicable disease fact sheet. 2006. Available from: https://www.who.int/hac/


Saeed U, Piracha ZZ. Viral outbreaks and communicable health hazards due to devastating floods in Pakistan.

World J Virol. 2016;5:82-4. [PubMed] [Google Scholar]

Okaka FO, Odhiambo BDO. Relationship between flooding and outbreak of infectious diseases in Kenya:

a review of the literature. J Environ Public Health. 2018;2018:5452938. [PubMed] [Google Scholar]

Rabiee MH, Mahmoudi A, Siahsarvie R, Krystufek B, Mostafavi E. Rodent-borne diseases and their

public health importance in Iran. PLoS Negl Trop Dis. 2018;12(4):e0006256. [PubMed] [Google Scholar]

Ando M, Uchiyama I, Masaji M. Impacts on human health. In: Global Warming: The Potential Impact on

Japan. In: Nishioka S, Harasawa H (eds.)]. SpringerVerlag, Tokyo, Japan, pp. 203-213.

Bradley DJ. Human tropical diseases in a changing environment. InCiba Foundation Symposium

â€Environmental Change and Human Health: Environmental Change and Human Health: Ciba

Foundation Symposium 175 2007 Sep 28 (pp. 146-170). Chichester, UK: John Wiley & Sons, Ltd. [PubMed]

[Google Scholar]

Curto de Casas SI, Carcavallo RU, Mena Segura CA, Galindez Giron I, Burgos JJ. Bioclimatic factors of

Triatominae distribution. Useful techniques for studies on climatic change. Entomol Vect. 1994;1:51-68.

Haines A, Epstein PR, McMichael AJ. Global health watch: monitoring impacts of environmental

change. Lancet. 1993 Dec;342(8885):1464-9. [PubMed] [Google Scholar]

Lear A. Potential health effects of global climate and environmental changes. NEJM. 1989;321:1577-83.

Carcavallo RU, de Casas SC. Some health impacts of global warming in South America: vector-borne

diseases. J Epidemiol. 1996;6(4sup):153-7. [Google Scholar]

Shope R. Global climate change and infectious diseases. Environ Health Perspect. 1991 Dec;96:171-4. [Google


Carcavallo RU, Galvão C, Rocha DS, Jurberg J, de Casas SC. Predicted effects of warming on Chagas disease

vectors and epidemiology. Entomología y Vectores. 1998;5:137.

Carcavallo RU. Climatic factors related to Chagas disease transmission. Mem Inst Oswaldo Cruz. 1999;94

Suppl 1:367-9. [PubMed] [Google Scholar]

Curto de Casas SI, Carcavallo RU. Climate change and vector-borne diseases distribution. Soc Sci Med. 1995

Jun;40(11):1437-40. [PubMed] [Google Scholar]