Thirty-six homes have been evacuated after a major incident was declared following a wildfire in north Wales.

The blaze broke out near Conwy Mountain and the Sychnant Pass in Conwy county on Sunday.

About 200 acres of land had been affected, and one family who were forced to flee their home said the fire reached their driveway.

“The sound was worse than anything. It was so loud, the crackling. You could hear it coming down the mountain,” said local resident Ben Campbell.

Anthony Jones, assistant chief fire officer for North Wales Fire and Rescue Service, said they were expecting the fire to spread because of the heatwave.

Jones said residents living nearby should keep windows and doors shut.

At the height of the incident, there was a fire front of about 1.6km (0.4miles), Jones added.

Michelle Campbell, 44, her husband Ben, 46, and their three sons fled their home in Capelulo as the fire reached their property.

Ben said he received a missed call at 04:30, but 30 minutes later a neighbour banged on their door and said: “The mountain’s on fire above your house.”

The couple and their three boys – aged three, seven and eight – initially moved to a holiday rental they own nearby, but were forced to leave that when the fire approached.

They have now rented a property on Anglesey for the week and are awaiting an update on their home.

“We have no idea what the situation is,” Michelle said.

“But we’re safe, and the boys are okay. And we’re insured.”

The couple said a river runs near their property, and fire crews were using it to pump water to fight the fire.

“It was really scary,” Michelle added.

Firefighters have been working in “challenging conditions” in order to contain the fire and protect local communities, said Jami Jennings, from North Wales Fire and Rescue Service.

“Wildfires can spread rapidly, particularly during periods of hot, dry and windy weather,” Jennings said.

“We continue to ask everyone to act responsibly by avoiding the use of disposable barbecues, ensuring cigarettes are fully extinguished and reporting any signs of fire immediately by calling 999.”

North Wales Fire and Rescue Service said it was alerted to the fire around 02:15 on Sunday morning, while local resident Rita Raweily said she was awoken to the sound of her dog “barking wildly”.

“I got ready, threw some clothes on and went to see if there was anything I could do to help,” she added.

The volunteer community coordinator said there was a smell of burning in the air that got worse as the wind picked up and the area was “really smoky”.

“That whole area near the house is an evacuation zone and we don’t know when we are going home,” she said.

“But that’s fine because we are safe.”

Raweily said she had “no idea” what condition her house was in but she hoped “all will be well”.

“I don’t think we are getting back in the house tonight. It is really worrying,” she added.

One person had been taken to hospital so far, she said, but “everyone is safe”.

Raweily advised people to follow the instructions provided by the emergency services, who have been “brilliant”, she said.

“Houses can be replaced, people can’t,” she added.

Speaking to Radio Wales Breakfast, Tim Lloyd, a former firefighter, who also lives in Capelulo village, said it was “engulfed in smoke” on Sunday.

“The view behind where I live, we can see the mountain, but we couldn’t see that yesterday, it was completely disappeared in the smoke,” he said.

He added that the conditions as a firefighter are “absolutely punishing” with one of the main concerns posed to crews is heat exhaustion.

“They’re wearing really thick heavy clothing fire kit, which protects them from the fire but the but the negative impact of that is that is they’re sort of insulated from being able to get heat out of their bodies.

“There’s all sorts of things to consider, but the main concern and their main focus is on an incident such as this one is always initially to protect people and then to protect property, which they’ve done a fantastic job here,” he added.

Cathy Augustine, county councillor for Penmaenmawr, said called the incident “incredibly sad” for the community and surrounding areas including the Pensychnant conservation centre.

“Not only is it very beautiful for us but it’s also really difficult terrain for the firefighters to work in, as well as being home to important wildlife.”

Augustine said volunteers had been out looking after the wild ponies in the area.

She added residents at any homes identified as being at risk will be contacted directly by the fire service and police, and that the council had opened a rest centre.

On Sunday evening, North Wales Fire Service said crews were also responding to a number of grass fires on Halkyn Mountain, in Flintshire, and the Braichmelyn Forest in Bethesda, Gwynedd.

It comes as most of Wales is deemed to be of “very high risk” of wildfires in the coming days.

Forecasters have said parts of the country will remain extremely hot and dry in the coming days as the country swelters in the third heatwave of the year.

Additional reporting by Nicholas Bourne and Oscar Edwards