The forecast for May 2024 expects significant water deficits for the 12-month period of February 2024 through January 2025 in South America, Africa, and Canada. Areas expected to experience surplus include central to eastern Africa, northern Australia, Europe, and Southeast Asia.
The forecast anticipates exceptional deficits to continue in northern and northwestern African countries, as well as some central and southern countries. Intense surpluses are expected to emerge in areas throughout the Sahel.
The forecast indicates that intense surplus will occur in most northern and central regions of Australia, with exceptional deficits diminishing in portions of the country near its western coast. Exceptional deficits are expected to emerge in Tasmania, as well as in pockets across New Zealand.
The forecast indicates that exceptional deficits will mostly dissipate in northeastern China, but continue in northern, southern, and northwestern portions of the country. Exceptional surplus is expected to diminish in southwestern China, though moderate to severe surpluses may continue in eastern regions of the country.
The forecast through July indicates widespread water deficits throughout much of Europe, including exceptional deficits in Finland, Estonia, Latvia, Lithuania, and Belarus. Moderate to extreme deficits are forecast for remaining areas of Europe and will be especially intense in southern Germany and along many rivers including the Danube, Drava, Allier, and Dordogne. Moderate surpluses are forecast for Ireland, and intense surpluses for southeastern Spain.
Intense water deficits will give way to milder conditions after November along with some pockets of moderate surplus. Until then, severe to exceptional deficits are forecast for Germany, particularly in the south and along the Rhine River, as well as in Switzerland, Finland, southeastern Norway, and southern Ireland. Moderate to severe deficits are expected in many other areas including the Baltics, parts of Eastern Europe, Scotland and England, and much of France. Areas of surplus include Hungary and parts of Serbia, Romania, and Bulgaria. Surpluses will be intense in southern Hungary.
Regions forecast to have significant water deficits for the 12-month period from June 2018 through May 2019 include: the US Pacific Northwest, southern Mexico, Brazil, Chile, Central and Northern Europe, northern Africa, the Middle East, Afghanistan, and southern India. Areas with a forecast of significant water surplus include: Tanzania, Kenya, Bangladesh, Myanmar, Laos, and Heilongjiang, China. This Watch List is based on ISciences Water Security Indicator Model (WSIM) run on 10 September 2018.
The forecast through September indicates that widespread water deficits in Central, Eastern, and Northern Europe will downgrade from exceptional levels in most affected regions but remain intense, especially in Central Europe and Finland. Deficits are expected to be extreme on many rivers including the Oder, Elbe, Danube, and Rhine. Surpluses are forecast for the Iberian Peninsula, parts of Eastern Europe and the Balkans, and European Russia.
In the near-term through May, water surplus in Central and Eastern Europe and European Russia is expected to shrink and downgrade, though remain widespread. In France and the UK, however, surpluses will increase in extent. Exceptional deficits will continue to emerge in Finland, Estonia, Latvia, and a pocket in central Sweden. A band of deficit conditions will persist across southern Italy, but deficits on the Iberian Peninsula will shrink and downgrade – with some surplus conditions emerging. After May, the forecast indicates a transition away from surplus to mild deficit in many areas.
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