The frequency and severity of low flows are projected to increase, making streamflow drought and water scarcity more severe and persistent in SEU and WCE  , but decreases are projected in most of NEU except the southern UK . In EEU, uncertainty about changes in water scarcity pose distinct challenges for adaptation . At 1.5°C GWL, the number of days with water scarcity  and drought will increase slightly in SEU , resulting in 18% of the population exposed to at least moderate water scarcity, increasing to 54% at 2°℃ GWL . Moderate water scarcity is emerging in some parts of WCE  increasing to16% of the population under 2℃ GWL and SSP2 . Under 4°C GWL, areas in WCE experience water scarcity, especially in summer and autumn. Future intensive water use can aggravate the situation, in particular in SEU .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report