A situation where a warning or alert is triggered but there is no actual danger or threat.

झूठी चेतावनी

English Usage: The fire alarm went off, but it was just a false alarm caused by the toast burning.

Hindi Usage: अग्निशामक अलार्म बजा, लेकिन यह बस एक झूठी चेतावनी थी क्योंकि टोस्ट जल गया था।