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Arson Suspected in Welsh Mountain Fire: Crews Battle Blaze
4 Aug
Summary
- Wildfire on Llanwonno mountain in Rhondda Valley believed to be deliberately started.
- Challenging conditions including mist and rain hamper firefighting efforts.
- Residents offered rest centre due to poor air quality from the smoke.

A wildfire on Llanwonno mountain in the Rhondda Valley, which began on Saturday afternoon, is now believed to be the result of deliberate fire-setting. Fire crews have been working continuously to contain the blaze, declaring it a major incident on Monday due to its scale and the "challenging conditions" on the mountain. These conditions include persistent low cloud, mist, and rain, which have complicated firefighting efforts and prevented the deployment of a specialist helicopter.
South Wales Fire and Rescue Service reported suspected deliberate ignition overnight on Monday, placing firefighters under "critical conditions" and stretching resources. Residents are not under evacuation orders, but a rest centre has been set up for those concerned about the poor air quality caused by the thick smoke. Some locals have described the fire as "frightening" and "very close" to their homes.
Firefighters are actively creating fire breaks and monitoring the area. The service is collaborating with partner agencies to extinguish the wildfire and prevent further spread, aiming to safeguard nearby properties and communities. Road closures remain in effect, and the public is urged to avoid the affected area. Authorities are appealing for any information regarding the deliberate fire-setting incidents.