Villagers in Northamptonshire have been urged to alert police to any cases of illegal raves taking place over the bank holiday weekend.
Police said the county did not have a problem with raves but evidence showed the holiday could attract such events.
People have been asked to call about suspicious activity or with information about where an event is being set up, to prevent them from taking place.
Once a rave has been established it can be difficult to clear, police added.
Supt Sean Bell said: "This weekend, officers will be patrolling hotspot locations, but we also need residents to be alert to suspicious activity, or unusual traffic movements and call us as soon as possible.
"The force intelligence bureau picks up good leads about likely rave activity but the best information comes in from callers who report activity that is out of the ordinary."