Approximately 40 % of interruptions in energy supplies are due to weather-related problems. Since other energy supplies also depend on electricity to some extent, power cuts affect this as well. According to most of today's climate scenarios storms are not expected to worsen due to climate change, but storms will continue to be a major cause of power outages because of trees falling on power lines.
Electricity and biofuels are the most important energy sources in the industrial, residential and service sectors. Of these two energy sources an interruption in the electricity supply has direct consequences for the end user, whereas disturbances in the biofuel supply has a significantly slower progression before it affects end users.
The demand for cooling is expected to increase for the summer months, because of a warmer climate, but also because the cooling of buildings and homes is increasing. The peak power demand will continue to occur during the winter, because it is affected by the amount of electricity used for heating. However, the heating demand could reduce with a future milder winter climate.
Effects of increased precipitation
More precipitation increases water saturation in the soil, and combined with less frost, this will increase the risk of rot or rust. As a consequence this could lead to a shorter service life of power poles and underground cables, and less resilience to for example strong winds.
Climate change will also affect both the natural gas system and district heating systems in the long run by, for example, increased corrosion and soil displacement/subsidence due to increased rainfall.
The enhanced climate and weather threats in Sweden are not considered to cause any greater nationwide disruptions in the supply of oil-based fuels. Filling stations wiped out by flooding, landslides or erosion means that in some areas it can be a long way to the next station for a period.
Effects on hydropower
Climate change is expected to have an impact on hydropower. Inflow to water reservoirs will even out over the year and probably also increase overall.
The spring flood will decrease and come earlier, due to milder and shorter winters. These changes do not cause vulnerabilities to the energy supply chain, but can instead provide new opportunities.