Plumes of smoke filled the air at Hartsholme County Park in Lincoln when grassland and trees caught fire.
Residents of the nearby Jarvis House tower block watched on as a scorched and dry field opposite the building went up in smoke amid the ongoing heatwave.
Four crews of firefighters were called to the blaze at around 1.20pm on Friday, July 6 – two from Lincoln South, one from Lincoln North and one from North Hykeham.
A Lincolnshire Fire and Rescue spokesperson said: “The fire is described to be affecting an area of grass and tree shrubs.
“Crews are still on the scene and the report states the fire is under control.”
Firefighters are said to be damping down at the time of publishing and the cause of the fire is still to be determined.
The City of Lincoln Council, which manages the park, said the fire had started in a meadow.
Caroline Bird, Community Services Manager, said: “We are happy to say that nobody was hurt, that the fire has been put out and the fire service has now left the park.”
A warning was issued earlier in the week following a number of grassland fires in the county.
On a number of occasions, dry open spaces were set alight by carelessly discarded cigarettes.