"Unfortunately, preparedness is generally very poor. Back in 2011, we identified 50,000 socially important businesses in Sweden that depended on power supply," Jan-Olof Olsson told public broadcaster SVT.
The broadcaster reported that power rationing could affect traffic lights, trams, heating and communications as well as electronic locks to properties.
Power costs were up 29% in August, according to the Swedish statistics agency. Energy prices have been driving other costs of living upwards, with food prices rising for nine consecutive months.
Energy prices have been skyrocketing in Europe since the EU countries imposed sanctions on Russia, citing the launch of the special military op in Ukraine. Brussels' decision resulted in a wave of inflation, while gas hit record-high prices, resulting in enormous electricity bills.