PEOPLE who recklessly start bushfires would be liable to pay for the damage their actions cause, Victorian police have warned.

Police say they have already charged a number of people this summer with causing bushfires, some of which have destroyed property.

Arson Squad Sen-Sgt Jeff Maher said police would prosecute anyone found to be acting in breach of fire restrictions.

He said those prosecuted would be liable for the damage done and the cost of fighting the fire.

"These are not small amounts of money. We are talking about huge costs," Sgt Maher said.

He said an alarming number of fires had been started through potentially dangerous acts like using angle grinders and farm machinery.