"We shouldn't really be here. They evacuated us but we came back to try and save the house.
"It's just a cauldron and we don't want to risk the house burning down, so we're staying here."
Spanish authorities have cut off public water supplies to conserve them for the fire-fighting effort, but that is making Mr Jackson's job even harder.
"I guess it's because they don't want people panicking and using water if they don't really need to," he said.
"But my friend has got hundreds of eucalyptus and pine trees and once they start burning you just can't stop them. The hot ashes of the pool house are smouldering and every time we leave them they catch fire again.
Spanish officials say the fires may have been started deliberately
"We're just having to go with buckets to neighbours' pools to get water. It's a terrible job because it's still so hot.
"My friend has had to take his neighbour to hospital because she's got bad asthma and the smoke is affecting her.
"Her car blew up last night when the fire reached it."
Mr Jackson said he understood that both the campsite and cemetery in Mojacar had been badly damaged by the fire.
"Yesterday was about 44 degrees," he said.
"It's like a horror film round here.
"As far as you can see basically everything has burned down."
"As I speak to you now, things have calmed down a bit, but last night they were catastrophic," 76-year-old Joan Ould told the BBC.
"We had three fires raging right behind our urbanisation. It's the second time in 10 days."
We were just hoping and praying it didn't come any closer
Mrs Ould and her husband live in a community of about 30 apartments on a hillside above Mojacar.
Both elderly, they have relied on younger neighbours for help.
"The fire was so close last night, it was getting really dangerous," she said.
"Unfortunately, our house is on the end and we've got a piece of waste ground beside us that's as dry as a tinder box. Our neighbour spent hours dousing it with water to try to stop it catching fire.
"We were just hoping and praying it didn't come any closer. It was very frightening.
"Our neighbour stayed up all night keeping watch in case we needed to get out of the building."
Mrs Ould said the temperatures on Thursday were unprecedented.
"It's just been so hot. When you went outside it was like sticking your head in an oven," she said.
Residents have been forced to leave their homes as the flames approached
"And the wind. It was so hot and it was blowing the fire towards the beach and the hotels. They all had to be evacuated - people spent the night on the beach.
"Mojacar was absolutely engulfed in smoke, there are probably people suffering from smoke inhalation.
"Right now, there are still helicopters overhead all the time and the sound of ambulances.
"There's a slightly cooler breeze today, so we're just keeping our fingers crossed. It really was scary."
Sixty-eight-year-old Val and her husband Terry, 72, live in an area opposite the fire, but it still came close enough to leave them shaken.
"It started about three o'clock, and by later in the evening it was like a volcano was erupting," she said.
Expats and holidaymakers spent the night outside after being evacuated
"There were flames pouring down the mountainside in rivulets, just like a volcano.
"It was heartbreaking, seeing so much destroyed.
"People are definitely frightened. Some of them only just got back in to their homes after the last time they were evacuated."
The Rodgers were due to stay at a favourite hotel next month, but it was destroyed by the flames.
"We were only staying there last week," she said. "It's sad, it was 300 years old, a beautiful building.
"Temperatures have just been incredible.
"I've been here 14 years and it's the hottest I've ever known it. It's unbearable, everything you touch is burning."
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