Assessment of the Record-Breaking 2020 Rainfall in Guinea-Bissau and Impacts of Associated Floods

1 Décembre 2023
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The impacts of Climate Change are quite visible in Guinea-Bissau. Greater irregularity

at the beginning and end of the rainy season, as well as in relation to the interannual variability of

precipitation, are evidence that shows these phenomena inWest African countries and particularly

in Guinea-Bissau, where the agriculture is rain-fed. The year 2020 was characterized as very rainy

in comparison to the climatological average of 1981–2020, with positive anomalies throughout the

country, despite the late arrival of the wet season, which usually occurs in May. July, August,

and September 2020 were the rainiest months, registering above a normal frequency of days with

precipitation greater than 50 mm. Bissau, the capital, registered a record-breaking annual rainfall and

monthly amounts higher than the 90th and 95th percentiles in July and August, respectively. This

heavy rain accompanied by strong winds caused flooding in several urban areas and agricultural

fields, and the destruction of roads, houses, and infrastructures in different cities across the country.

As a way of mitigating these impacts, the government, through the Ministry of Solidarity, made

available 100 million CFA francs (6.5 million euros) to help families that were victims of the floods.