The publication comes as the debate on security – and the possibility of joining Nato – has intensified in Sweden in the wake of Russia’s annexation of Crimea in 2014 and recent incursions into Swedish airspace and territorial waters by Russian planes and submarines.

The country has begun reversing military spending cuts and last year staged its biggest military exercises in nearly a quarter of a century, as well as voting to reintroduce conscription and unveiling joint plans with Denmark to counter Russian cyber-attacks and disinformation.

The leaflet advises people to think about how to cope if there was no heating, food became difficult to buy, prepare and store, there was no water in the taps or toilet, and cash machines, mobile phones and the internet stopped working.