Contingency firefighters have dealt with incidents across South Yorkshire while crews are on strike.
Arsonists set a Nissan Micra on fire in Halliwell Crescent, Southey Green, Sheffield, on Saturday, at 7.45pm.
Elsewhere in the city that night, a bonfire blazed out of control on Morley Street, Walkley, at 8.10pm, a wheelie bin was set alight on Norborough Road, Tinsley, at about 8.45pm, and a rogue firework started a blaze in a greenhouse on High Storrs Road, High Storrs, at a similar time.
Crews also attended a bush fire on Ickles Way, Templeborough, Rotherham, at 11pm.
On Sunday, at about 4am, crews were called to a Vauxhall Insignia car set alight on Old Moor Lane, Brampton, Rotherham.
Also that morning, crews attended a fire started deliberately in a bin store in Shortbrook Drive, Westfield, Sheffield.
Yesterday, at about 5am, crews were called to the M1, between junctions 36 and 37, between Tankersley and Dodworth, after a car burst into flames due to an engine fault.
Firefighters walked out on Friday evening, until 6pm today, in a row over pensions.