
In Sheffield, two wheelie bins were set alight in Goathland Drive, Woodhouse and a pile of rubbish was torched in Clay Pits Lane, Stocksbridge.
Doncaster crews dealt with a hedge burnt in Sedgefield Way, Mexborough; a tree set on fire in Hayfield Lane, Auckley and car torched in Haigh Crescent, New Rossington.
Anyone with information should call South Yorkshire Police on 101.