STOCKHOLM — It’s not that Sweden’s government is nervous. Officials just want the 4.8 million Swedish households to be prepared for rising seas, cyber sabotage, fake news, terrorist attacks, food shortages or even war with a certain big neighbor to the east.

“What would you do if your everyday life was turned upside down?” reads the introduction to “If Crisis or War Comes,” a newly revised emergency handbook from the Swedish Civil Contingencies Agency.

The revised handbook, in Swedish and English, was posted on the agency’s website on Monday. It is the first significant revision of the handbook since the midst of the Cold War a half century ago, and reflects an evolving diversity of threats that include flooding from climate change and the vulnerabilities of the internet and social media to hackers and malcontents.

“Although Sweden is safer than many other countries, there are still threats to our security and independence,” the handbook asserts, without identifying precisely which other countries or groups harbor hostile intentions.