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.
Regions forecast to have significant water deficits for the 12-month period of June 2021 through May 2022 include: the U.S. West, Canada, North Africa, Central Asia, and Hokkaido, Japan. Areas with a forecast of significant water surplus include: Northeast China, the Yellow River, Yangtze River, Nepal, Bangladesh, and the Yenisei River. This Watch List is based on ISciences Water Security Indicator Model v2 (WSIMv2) run on 7 September 2021.
The forecast indicates a transition away from widespread, intense water surplus to deficit. Deficits are forecast for peninsular Malaysia, Borneo, Sulawesi, New Guinea, Java, pockets in Sumatra, and eastern Mindanao. Deficits will diminish somewhat in northwestern Cambodia, increase in southeastern Thailand, and emerge in Vietnam east of Hanoi and in central Myanmar. Surpluses are forecast for western and southern Myanmar, northern Laos, northwestern Vietnam, eastern Cambodia into Vietnam, central Philippines, and East Nusa Tenggara.
The July through September forecast shows the near absence of widespread surpluses observed in prior months. However, exceptional surpluses are forecast for western Myanmar; northern Prachuap Khiri Khan Province, Thailand; the extreme southeastern region of Sulawesi; and Flores Island in Indonesia. Severe to exceptional deficits are indicated in much of Cambodia, in Vietnam’s Mekong Delta, and in central Papua New Guinea. In the October-December timeframe moderate deficits are indicated in many parts of the region, and thereafter deficits in Southeast Asia may intensity.
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