Firefighters in England and Wales will go on strike today and tomorrow , in a row with the government over pensions.
Fire Brigades Union members will walk out for four hours at 6:00pm on Friday, and again on Saturday, with threats of more strikes in 2014.
They're still going to any major fires, but fire bosses advised people to take extra care with home cooking.
The government says the strike action is completely unnecessary and will harm the reputation of firefighters.
There were strikes earlier this year too - the union are concerned about government plans to raise the age firefighters need to retire.
At the moment firefighters can retire at the age of 55, but the government wants to raise that age to 60.