*Water Watch Lists
ISciences staff
ISciences Worldwide Water Watch List June 2025

The forecast through February 2026 expects deficits in Central and Eastern Europe, Central Asia, and the Levant. Surpluses are expected in the western Amazon, the Sahel and southern Africa, and northeastern Australia.

ISciences Worldwide Water Watch List June 2025
Australia & New Zealand
ISciences staff
Australia & New Zealand: Surpluses spread ...

Severe to exceptional surpluses will remain throughout Queensland. Exceptional deficits will occur in portions of Victoria, Western Australia, Tasmania, and New Zealand. 

Australia & New Zealand: Surpluses spread throughout Queensland
East Asia
ISciences staff
East Asia: Deficits continue in NW China, ...

Exceptional deficits will occur in northwestern and southeastern China, widespread throughout the Yangtze River Basin. Isolated pockets of surplus will affect portions of central and northeastern China. 

East Asia: Deficits continue in NW China, Yangtze River Basin
Southeast Asia & Pacific
ISciences staff
Southeast Asia and the Pacific: Deficits ...

Exceptional surpluses throughout Maritime Southeast Asia will mostly diminish, though pockets of severe to exceptional deficits will persist in portions of the Philippines, Indonesia, Papua, West Papua, and New Guinea. 

Southeast Asia and the Pacific: Deficits persist in Maritime SE Asia
South Asia
ISciences staff
South Asia: Deficits remain in Afghanistan, ...

Exceptional surpluses in India will mostly dissipate, transitioning to moderate to severe surpluses. Exceptional deficits will remain in Afghanistan and Pakistan. 

South Asia: Deficits remain in Afghanistan, Pakistan, surpluses persist in India

Western United States: Deficit impacts continue into Sept 2015

The prolonged drought in California has garnered significant political, public, and media attention. The WSIM Composite Surplus/Deficit Index for the next six months (April-Sept 2015), significant deficits will persist or intensify throughout much of the region, including Oregon, Washington, Nevada, Idaho, Utah, and Arizona.  The multi-year regional drought is already impacting agriculture, electricity generation, domestic supplies, and real-estate development.

Coastal Western Africa: Exceptional deficit impacts through end of 2015

WSIM forecasts a widespread and exceptional drought for coastal West Africa (Gabon through Sierra Leone) peaking from July through Dec 2015. The affected region includes heavily populated areas of Nigeria and the countries facing challenges in the aftermath of the Ebola outbreak.

Spain & Portugal: Extended deficit impacts through 2015.

WSIM forecasts an extended drought for much of Portugal and western/southern portions of Spain.  The map is based on three months of observed data (January 2015 - March 2015) and nine months of forecast data (April 15 - December 15).  Portugal and western Spain are forecast to experience drier conditions than normal, especially along their shared border.

Many analyses reported in ISciences-authored blog posts are based on data generated by the ISciences Water Security Indicator Model (WSIM). Other sources, if used, are referenced in footnotes accompanying individual posts. WSIM is a validated capability that produces monthly reports on current and forecast global freshwater surpluses and deficits with lead times of 1-9 months at 0.25°x0.25° resolution. This capability has been in continuous operation since April 2011 and has proven to provide reliable forecasts of emerging water security concerns in that time-frame. WSIM has the ability to assess the impacts of water anomalies on people, agriculture, and electricity generation. Detailed data, customized visualizations, and reports are available for purchase.

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