Barrage de l'Hongrin — Hydroelectric dam
Château-d'Oex, canton de Vaud
Moderate action, warming reaches about 2°C
Watch closely
Climate exposure score
This is how exposed Barrage de l'Hongrin is to climate-related disruption in a world that warms by 2°C. A higher number means more disruption to output, more maintenance, or more risk to the structure itself.
Exposure is expected to peak around 2045.
What is driving the risk
Heatwave frequency
+27 by 2050Warmer summers increase evaporation from the reservoir surface.
Precipitation extremes
+36 by 2050Heavier rainfall events raise sediment inflow and spillway demand.
Drought stress
+40 by 2050Less snowmelt means the reservoir refills more slowly each spring.
Temperature variability
+27 by 2050Shifting freeze-thaw cycles add stress to the dam structure.
Projected exposure, 2025 to 2050
Each line shows how exposure changes if global warming follows that path.
What this means for you
Reduced snowpack is the core risk: the reservoir refills later and less fully, limiting pumped-storage flexibility in late summer. Revising the annual storage plan is the single most effective response.