In the event of war or the threat of war, the Swedish government may announce a heightened state of alert to improve the country's ability to defend itself.

A heightened state of alert requires that we unite against an aggressor, while ensuring that essential services and functions remain uninterrupted. If such an event arises, you may also be called upon to serve in various capacities.

Announcements regarding a heightened state of alert will be broadcast through various channels, including radio, TV, and teletext. The emergency alarm may also be used to signal the highest state of alert.

The emergency alarm signals that Sweden is in a state of war or imminently threatened with armed conflict. The entire total defence must be mobilised immediately, and everyone must prepare for war. The entire country has entered the highest state of alert.