Residents are being urged to keep their eyes peeled as part of the SpringWatch campaign to tackle anti-social behaviour.
The measures to reduce the number of incidents in St Helens are part of a joint initiative by the council, emergency services and social housing landlords.
Coun Richard McCauley, cabinet member for community safety said: “We’re asking residents to be our eyes and ears so we can all help keep St Helens safe and clean.
“When you see off-road vehicles out causing a nuisance in the community, or anyone looking to set a nuisance fire in parks, please report it on 101.
“This type of behaviour will not be tolerated, and the police will seize off-road vehicles and take legal action on arson.”
As well as stepping up patrols in hot-spot locations, the council is providing a range of youth activities.
Last year’s campaign contributed to an 18 per cent drop in reported incidents, officials said.
Firefighters will be visiting schools throughout the borough to deliver presentations on the dangers of nuisance fires.
Group Manager Chris Case, district manager for St Helens, said: “2013 was a challenging year for us with 100 arson grass fires in the space of 12 days, between the end of March and April. This presents a significant danger to people’s property, wildlife, motorists and the people who start these fires who do not realise how quickly the fire can spread.”
For more information about the campaign, visit www.safersthelens.org.uk