The Fire Brigades Union have announced a national strike in the ongoing dispute with the Government over firefighter pension reforms.
Strike action is due to take place on three days over the May Bank Holiday weekend: Today, Friday, May 2 from 12pm to 5pm, Saturday May 3 from 2pm to 2am and Sunday, May 4 from 10am to 3pm.
The service has a legal duty to maintain a level of service to local communities as best it can and Cornwall Fire and Rescue Service will continue to respond to 999 calls and will "do everything it can to keep the public safe" during these periods of strike action.
The fire service says that this is a national dispute over firefighter pensions which it does not have the power to resolve at a local level.
The service has been preparing for the possibility of strike action and have been sending out prevention messages to advise people how they can help themselves to minimise the risk of a fire.
A spokesman added: "Now that strike action has been confirmed, the most important thing to remember is that if you do have a fire, get out of the building, stay out and call 999.
"We will continue to respond to emergency calls and will obviously prioritise those where lives are at risk."