And yearly in the United States, floods cause over $7 billion in damage. Primary effects
The primary effects of flooding include loss of life and damage to buildings and other structures, including bridges, sewerage systems, roadways, and canals. Floods also frequently damage power transmission and sometimes power generation, which then has knock-on effects caused by the loss of power. This includes loss of drinking water treatment and water supply, which may result in loss of drinking water or severe water contamination. It may also cause the loss of sewage disposal facilities. Lack of clean water combined with human sewage in the flood waters raises the risk of waterborne diseases, which can include typhoid, giardia, cryptosporidium, cholera and many other diseases depending upon the location of the flood. Damage to roads and transport infrastructure may make it difficult to mobilize aid to those affected or to provide emergency health treatment. Flood waters typically inundate farm land, making the land unworkable and preventing crops from being planted or harvested, which can lead to shortages of food both for humans and farm animals. Entire harvests for a country can be lost in extreme flood circumstances. Some tree species may not survive prolonged flooding of their root systems. Health effects
Fatalities connected directly to floods are usually caused by drowning; the waters in a flood are very deep and have strong currents.
Potential gender dependency
While no definitive proof has been found linking migraine to gender, statistical data indicates that women may be more prone to having migraine, showing migraine incidence three times higher among women than men. The Society for Womens Health Research has also mentioned hormonal influences, mainly estrogen, as having a considerable role in provoking migraine pain. Studies and research related to the gender dependencies of migraine are still ongoing, and conclusions have yet to be achieved. References
Notes
Olesen J (2006). The headaches (3 ed.). Philadelphia: Lippincott Williams & Wilkins. ISBN 9780781754002. Further reading
Ashina M (November 2020). Ropper AH (ed.). "Migraine". The New England Journal of Medicine. 383 (19): 1866–1876. doi:10.1056/nejmra1915327. PMID 33211930. S2CID 227078662. Oskoui M, Pringsheim T, Billinghurst L, Potrebic S, Gersz EM, Gloss D,  et al. (September 2019). "Practice guideline update summary: Pharmacologic treatment for pediatric migraine prevention: Report of the Guideline Development, Dissemination, and Implementation Subcommittee of the American Academy of Neurology and the American Headache Society". Neurology. 93 (11): 500–509. doi:10.1212/WNL.0000000000008105. PMC 6746206. PMID 31413170. Oskoui M, Pringsheim T, Holler-Managan Y, Potrebic S, Billinghurst L, Gloss D,  et al. (September 2019). "Practice guideline update summary: Acute treatment of migraine in children and adolescents: Report of the Guideline Development, Dissemination, and Implementation Subcommittee of the American Academy of Neurology and the American Headache Society". Neurology. 93 (11): 487–499. doi:10.1212/WNL.0000000000008095. PMID 31413171. S2CID 199662718. External links

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