High-Risk Areas (IMAGE) Columbia Climate School Caption Projections of decreased potential for snow to supply spring and summer human water demand by mid-century (reddest areas are highest risk; yellow, lowest) are presented. In blue/white areas, future rainfall should be sufficient to supply present human needs; gray regions indicate basins where rainfall might be insufficient, potentially making them dependent on snow or other sources. Credit Mankin et al., Environmental Research Letters 2015 Usage Restrictions Credit must be given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.