Stand-in firefighters cut several people free from a serious road accident in South Yorkshire during the weekend strike.
Contingency crews were called to Bawtry Road, Wickersley, Rotherham, following a horrific pile-up on Saturday.
Seven people were taken to hospital by road or air ambulance following the crash, just after 5pm.
South Yorkshire firefighters took industrial action three times over the weekend amid an ongoing row with the government over proposed changes to their pensions and retirement age.
It left services ‘severely depleted’, with just eight fire engines in use for the whole of South Yorkshire from 12pm to 5pm on Friday, 2pm on Saturday to 2am yesterday and again from 10am to 3pm yesterday.
Matt Wrack, general secretary for the Fire Brigades Union, called on the government to reconsider its proposals.
He said: “Future strikes could be avoided simply by the government honouring current pension promises and releasing proposals for the future that reflect the discussions we’ve held over the last three years.”
Contingency fire crews were called to three incidents on Friday and 11 on Saturday, including:
A garden fire on Wood Royd Road, Deepcar, Sheffield.
A disused shelter in woods on fire, Station Road, Halfway, Sheffield.
Helping ambulance crews gain entry to premises where a woman in her 90s needed help on Frith Close, Intake, Sheffield.
Rubbish in a subway on fire on Kimberworth Road, Kimberworth Park, Rotherham.
A small fire in some woods, Midland Road, Royston, Barnsley.
A fire in a wooded area on Stubbing House Lane, Birley Edge, Sheffield.