Firefighters entered a burning former pub in Barnsley after it was set alight in an arson attack.
The blaze at the former Butchers Arms on Judy Row, Monk Bretton, was reported to emergency services at 3am yesterday.
When fire crews arrived they found the first floor engulfed in flames.
Four firefighters wearing specialist breathing apparatus entered the building to extinguish the flames.
They spent around two hours at the scene and said the blaze was started deliberately.
At 6.45am yesterday firefighters were called out to a second arson attack in Monk Bretton - after a disused residential home was found burning.
The blaze on Burton Road is also believed to have been started deliberately.
When crews arrived the roof was well alight.
At 4.45am yesterday firefighters were called to Laughton Road, Dinnington, Rotherham, after reports that four industrial bins behind Poundstretcher were alight.
Flames spread to the roof of a card shop next door.
On the same night firefighters also dealt with a bin set alight on Princes Street, Masbrough, Rotherham, and a blaze on allotments on Hoyle Mill Road, Hoyland, Barnsley, which was also started deliberately.
The cause of a fire on a field off Pond Road, Stannington, Sheffield, is not known.
n Anyone with information should call South Yorkshire Police on 101.