Firefighters in England and Wales were set to walk out for a fourth time on Wednesday of this week.
Workers are fighting attacks on their pensions and changes to their retirement age.
They are due to strike from 10am until 2pm. The FBU union called the strike after Tory fire minister Brandon Lewis withdrew his latest offer.
Firefighters are furious at Tory plans to increase their retirement age from 55 to 60.
The Tories also want to make it easier for bosses to sack firefighters if they fail to maintain standards of fitness as they get older.
Firefighters in Scotland have not taken part in the strikes while talks with the government are ongoing. But last week the FBU launched a ballot for action short of a strike, which will include members in Scotland.
It would allow members to collectively refuse to undertake specific additional duties and collectively refuse participation in other activities, including voluntary activities.
The ballot ends on 4 December and the FBU is urging members to vote yes.