The Swedish government will distribute leaflets to the country’s 4.7 million households later this year explaining what to do if war breaks out with Russia, the Civil Contingencies Agency in Stockholm said Thursday.

The announcement comes in the middle of a heated parliamentary election campaign, and amid a renewed fear of hostilities with its eastern neighbor.

The leaflets will also explain how Swedes should react in a terror attack, after a natural disaster or following a cyberattack against critical infrastructure.

The move was prompted in part by the “security situation” in the Baltic Sea, officials told CNN.

Russia has built up a significant military presence on its western border in recent months.

The leaflets will suggest preparing long-abandoned Cold War bunkers and stockpiling food, water, and blankets.

“There is a significantly more complex threat with climate change, terror attacks, pandemics and manipulation of information,” Christina Andersson, of the Swedish Civil Contingencies Agency, told the Aftonbladet newspaper. “People need to learn and know about how to deal with it.”

The leaflet drop is part of a wider effort by Stockholm to revamp its defenses in light of increased Kremlin aggression: