Firefighters from 10 stations across Swansea, Carmathenshire and Neath Port Talbot were called to the massive grass fire on Kilvey Hill just before 10pm on Wednesday night (9 April).
Firefighters are still damping down the scorched hillside over 12 hours later.
South Wales Police urged people to keep their windows and doors closed and to avoid the area where possible.
A spokesperson for Mid and West Wales Fire and Rescue Service said: “At 21:47pm on 9th April, Mid and West Wales Fire and Rescue Service were called to reports of a grassfire at Kilvey Hill, Swansea.
“Crews from Swansea Central, Swansea West, Ammanford, Port Talbot, Morriston, Reynoldston, Pontardulais, Neath, Gorseinon and Pontardawe Fire Stations were in attendance.
“At it’s height the grassfire, covering an area of grass and gorse was 12 hectares, fire crews utilised a ground monitor and drone, and sectorised the fire. Then continued to extinguish the fire using a number of main jets and hose reel jets.
“Crews remain on scene to dampen down and monitor.”
The fire service say that it has attended 192 grass fires in the past week, with 13 of those over 10 hectares or 25 acres in size.
(Image: Mid and West Wales Fire and Rescue Service)
The fire service spokesperson added that: “Such large-scale incidents require extensive resources and coordination to manage effectively.”
Plans for a new leisure destination by New Zealand company Skyline were recently approved by city planners on Kilvey Hill.
(Lead image: Mid and West Wales Fire and Rescue Service)
