Electricity shortage could lead to rationing
Swedes are being warned that there could also be record high prices during the winter.
A drop in supplies from from hydropower is being blamed after the warm, dry, summer. But researchers say another problem is that Swedes use too much energy - twice the average amount consumed by the Danes, Germans and Brits.
If the autumn is fairly dry, prices are expected to rise and experts say Sweden may need to import electricity.