A very short notice or with little advance warning

थोड़े समय के नोटिस पर

English Usage: The firefighters were always ready to respond to any emergency at a moments notice.

Hindi Usage: फायरफाइटर्स हमेशा किसी भी आपातकालीन स्थिति के लिए तुरंत तैयार रहते थे.