Ten homes had to be evacuated in Kelloholm, in Dumfries and Galloway, after a grass fire came within a few feet of residents' gardens.
Many of those evacuated were people over the age of 70.
One resident described it as "an inferno" and said "it was a very frightening experience".
A number of grass fires have been started in Dumfries and Galloway over the Easter period.
Police say that the latest were set alight last night at on waste ground between Glenwhargen Avenue in Kelloholm and the River Nith.
The second was on waste ground between Blackaddie Road Sanquhar Police Station.
Anyone with information is being asked to contact Police Scotland on the new non emergency number 101 or Crimestoppers on 0800 555 111.
Police in Sanquhar are stepping up their hunt for a suspected arsonist after a sixth grass fire in four days. None have yet caused serious damage but police suspect the same person is responsible.
Police in the Sanquhar area are stepping up their hunt for a suspected arsonist after a sixth grass fire in the space of four days.
The latest was in Queen's Road, Sanquhar on Saturday 30th March. None have yet caused serious damage but officers still suspect that it is the same person setting them.
A Dumfries and Galloway Fire and Rescue spokesman said:
“The fires were all put out by the firefighters using beaters and hoses. The causes of the fires have been put down as suspected to be deliberate by an unknown person or persons.”
A Dumfries and Galloway Police spokesman said:
“The causes of the fires are being investigated. We are anxious for anyone with information to come forward so that whoever is responsible can be apprehended.”
Firefighters from Sanquhar in Upper Nithsdale have been called out to the fires around the town.
They have managed to put them all out without serious damage but suspect it is the same person starting all of them.
Three fires were set off in and around Sanquhar within the space of four hours on Wednesday and then a fourth was discovered alongside the A76 Dumfries - Kilmarnock Road at Guildhall Bridge, Kirkconnel.
The latest was on Friday night at Mary’s Street at Sanquhar where firefighters managed to put out the flames using beaters.A Dumfries and Galloway Fire and Rescue spokesman said:
“The fires were all put out by the firefighters using beaters and hoses.“The causes of the fires have been put down as suspected to be deliberate by an unknown person or persons.”
Celebrations are being held to mark the 300th birthday of the world's oldest post office in Sanquhar in Dumfries and GallowayRead the full story ›
David Mundell MP, told ITV Border about the post office:
A plaque has been unveiled at Sanquhar post office, recognising it as the world's oldest working post office.