Tornado sirens are the outdoor warning horns used across tornado-prone parts of the United States to alert people to take shelter, and their rising wail is instantly recognisable even to viewers who have never heard one in person. Online, creators have taken that familiar alarm and pushed it into earrape territory, deliberately distorting and amplifying it for comedy and shock value. That louder version spread through meme edits, gaming clips and short-form videos, where it now works as a shorthand for incoming chaos rather than a real weather warning.