Exceptional deficits throughout Africa will persist in northwestern, northern, and central countries. Surpluses will remain along the Sahel.
Exceptional deficits will remain throughout the Amazon and the Boliviarian Nations. Similar deficits will occur in northeastern coastal regions of Brazil, in Argentina, and in Chile.
The forecast for November 2024 expects significant water deficits for the 12-month period of August 2024 through July 2025 in northern South America, Canada, northwestern and eastern China, and northern to central Africa. Areas expected to experience surplus include central Africa, South Asia, and Central America.
With the release of WSIM v3 and 8 years of additional data, we reevaluate drought risk in the Amazon and the historic drought that continue to affect the region.
The forecast indicates that extreme to exceptional surpluses in northern Australia will diminish, though will still remain present in some regions of Northern Territory. Exceptional deficits across the continent will similarly dissipate, though severe deficits are expected along the southern coast of Victoria.
Through January 2020 deficits will shrink and downgrade considerably, though intense deficits are expected in coastal Mauritania, eastern South Africa, and Lesotho. Surpluses will increase in East Africa and in nations along the northern shore of the Gulf of Guinea, with exceptional anomalies in central Nigeria and extreme and widespread surpluses in Tanzania.
The forecast through May indicates that water deficits will downgrade, with moderate anomalies throughout most of the continent, some pockets of greater intensity, and surpluses in Tanzania. Exceptional deficits are forecast in the Ethiopian Highlands. Other areas of significant deficit include Equatorial Guinea, Lesotho, Guinea-Bissau, central Republic of the Congo, eastern Angola, western Zambia and central Zambia and along the Zambezi River, and northern Zimbabwe.
The forecast through February indicates that water deficits will downgrade considerably. However, areas with notably intense conditions include western Ethiopia; pockets of northern Somalia, Nigeria, and southwestern Cameroon; southwestern Angola into Namibia; and, Lesotho and the Orange River region of Northern Cape, South Africa. Surpluses are forecast for Tanzania, southern Congo into western DRC and northern Angola, and south-central Chad.
Regions forecast to have significant water deficits for the 12-month period from August 2018 through July 2019 include: Quebec (Canada), Amazonas (Brazil), Chile, Germany, Finland, Latvia, Egypt, western Cambodia, and southeastern Australia. Areas with a forecast of significant water surplus include: Texas (US), Liberia, Paraguay, Myanmar, and Heilongjiang (China). This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 12 November 2018.
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