The 3T22 is a Federal Signal outdoor warning siren widely installed in American towns for tornado and civil defense alerts, and its attack tone is the steady wail most people recognise from emergency tests and storm warnings. The sound has become a familiar shorthand for danger in videos, games, and edits, where a few seconds instantly set a serious or apocalyptic mood. A similar siren effect is often used alongside the -999 Social Credit Siren in meme edits that parody emergency broadcasts and exaggerated warnings.
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The rising 3T22 attack siren tone used for tornado warnings and emergency alerts, a loud wailing civil defense sound for dramatic warnings and disaster scenes.
This is a short recording of a 3T22 outdoor warning siren sounding its attack tone, the steady rising and falling wail used to alert communities to tornadoes and other emergencies. The tone starts low, climbs to a piercing high pitch, then drops again in a slow, relentless cycle that feels urgent and impossible to ignore. It carries the familiar sound of civil defense sirens heard in towns across the United States, instantly signalling danger and putting listeners on edge. In a video, even a second of it creates tension, dread, and a sense that something serious is about to happen.
