Crews have been sent out to tackle two blazes in a Doncaster crop field, that are both believed to have been started deliberately.
The fires were started at Grange Farm in Mere Lane, Armthorpe where standing corn was set alight on both occasions.
The first blaze was started at around 4.30pm on Friday, August 7 and the second at 11.30am yesterday morning.
It took crews over an hour to extinguish each of the fires.
A South Yorkshire fire and rescue spokesman confirmed both fires are believed to have been started deliberately.
They continued: “We get called to dozens of field and farm fires each year in South Yorkshire, with many of these fires occurring around harvesting time.
“Not only do fires like this put lives at risk by potentially diverting fire engines away from other, life threatening incidents, they also cost farmers thousands of pounds in damage.
“The maximum sentence for arson is life in prison. People do get caught and do get prosecuted, so we urge people to report arsonists to the police.”
Anyone with information about people starting fires in their area should call Crimestoppers, anonymously, on 0800 555 111.