A helicopter has now joined the effort to bring the fire under control. The helicopter is dropping water on the fire which has spread to forestry.
Earlier: Fire crews are battling a major gorse fire believed to have started when a car crashed into a ditch.
The alarm was raised shortly after 5.00pm when the blaze on Woodcock Hill Co Clare was reported by passers-by.
Two units of the fire brigade from Shannon Town were initially mobilised to the scene.
Gardaí responded to the area also and soon located a burning car now believed to have started the blaze.
Additional units of the fire brigade from Limerick City were requested to mobilise to help tackle the fire while additional appliances from Ennis have also been sent to the scene.
Fire crews are working in challenging conditions to bring the fire under control. Temperatures in the mid to high 20s and rough terrain are making the task difficult for crews.
Firefighters are expected to be at the scene for several hours yet.
Gardaí from Shannon are investigating the incident.
A tough evenings work for our crews along with those from Shannon and Ennis Brigades dealing with this incident in extremely hot temperatures. We would urge people to be mindful of the increased… https://t.co/MP4CUh1Cg9
— Limerick Fire (@LimerickFire) June 24, 2018