Curiosity didn't kill this cat, but it certainly gave it a good scare.

Firefighters were called to a property in Faulconbridge in the Blue Mountains on Wednesday to rescue a mischievous moggy that, somehow, had become wedged between a water tank and a building.

A neighbour had heard what he thought was a child crying just before 3pm and, when he went to investigate in a nearby yard, found the warbling cat trying desperately to free itself.

The good Samaritan called the Springwood Fire and Rescue NSW station, and firefighters hopped in their truck and went to the rescue.