The recent warm and dry weather may have contributed to a moorland fire on the hills above Clowbridge Reservoir.
Firefighters from Burnley were called to put out a blaze on the moorland around Manchester Road.
They used beaters and leaf-blowers to fight the flames.
A spokesman for the fire service said: “Two crews were there for around 30 minutes to put out the blaze, which we believe was started accidentally.
“The fire, which started around 7-20pm on Tuesday, June 9th, covered an area of grassland of around 200 metres by 100 metres.”