Firefighters in northern California have finally begun gaining ground on the massive wildfire that has claimed at least six lives after doubling over the weekend – fuelled by hot, dry conditions and swift winds that pushed the flames.

As those workers, spread thin by the unrelenting conditions, fight to contain the fire that has left a charred area the size of Denver in its wake, the tragic stories of people trying to save their loved ones have begun to unfold, as at least seven people still remain missing in the region amid thousands of evacuations.

The family of a 70-year-old woman and two children killed by the massive fires, for instance, described the final moments of their loved ones, with the woman trying in vain to save her two great-grandchildren using a wet blanket at their house outside of Redding.

The victims were identified by relatives as James Roberts, five, his sister Emily, four, and their great grandmother, Melody Bledsoe, 70.

Ms Bledsoe’s granddaughter, Amanda Woodley, said on Facebook: “Grandma did everything she could to save them, she was hovered over them both with a wet blanket.

“The family that lives in town are all together mourning three amazing souls. My heart is crushed I can’t believe this is real.”

California in flames: wildfires rage across the US state in 2018 Show all 45 1 /45 California in flames: wildfires rage across the US state in 2018 California in flames: wildfires rage across the US state in 2018 Firefighters try to limit the spread of the Carr Fire by backburning, a process by which areas in the path of a fire are burned up in advance to rob the fire of its fuel Getty California in flames: wildfires rage across the US state in 2018 A street is devastated by the Carr Fire in the town of Redding AP California in flames: wildfires rage across the US state in 2018 A truck burned by the Delta Fire is abandoned along interstate 5 AFP/Getty California in flames: wildfires rage across the US state in 2018 This image from the National Oceanic and Atmospheric Administration highlights the major fire AP California in flames: wildfires rage across the US state in 2018 The Ranch Fire spots out ahead of the main fire in Spring Valley, burning two homes AP California in flames: wildfires rage across the US state in 2018 A picture taken by German astronaut and geophysicist Alexander Gerst, showing wildfires in the state of California as seen from the International Space Station AFP/Getty/ESA/Alexander Gerst California in flames: wildfires rage across the US state in 2018 Evacuees from Lucerne, from left, Ken Bennett with Ember Reynolds, 8, and Lisa Reynolds watch the sunset as smoke from the Ranch Fire rises into the sky at Austin Park Beach in California's Clearlake with Mount Konocti in the background The Press Democrat via AP California in flames: wildfires rage across the US state in 2018 The memorial for Redding firefighter Jeremy Stoke AP California in flames: wildfires rage across the US state in 2018 Aerial view of Trabuco Canyon as a tanker aircraft dumps load onto Holy Fire, Near Santiago Peak, California, U.S., August 6, 2018 in this still image taken from a video obtained from social media. 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MANDATORY CREDIT SOCIAL MEDIA REUTERS California in flames: wildfires rage across the US state in 2018 Holy Jim volunteer firefighter Luke Senger stands next to a home destroyed the Holy Fire in Trabuco Canyon AP California in flames: wildfires rage across the US state in 2018 Firefighters try to stop the spread of a massive fire in Lake County AP California in flames: wildfires rage across the US state in 2018 A woman walks out of the water after taking a dip as smoke rises in the distance from the Holy Fire in Cleveland National Forest Getty California in flames: wildfires rage across the US state in 2018 A pyrocumulus cloud (or cloud of fire) explodes in the Carr fire near the town of Redding Getty California in flames: wildfires rage across the US state in 2018 The Delta Fire burns in the Shasta-Trinity National Forest AP California in flames: wildfires rage across the US state in 2018 Trees set alight near Whiskeytown Getty California in flames: wildfires rage across the US state in 2018 An firefighting aircraft drops fire retardant to slow the spread of the River Fire near Lakeport Getty California in flames: wildfires rage across the US state in 2018 A firefighter lights backfires in an attempt to limit the spread of the Ranch Fire Reuters California in flames: wildfires rage across the US state in 2018 Firefighters light backfires to defend houses in the town Upper Lake from the Ranch Fire Getty California in flames: wildfires rage across the US state in 2018 Flames consume a home in Lakeport AP California in flames: wildfires rage across the US state in 2018 The Ranch Fire spread towards the town of Upper Lake AFP/Getty Images California in flames: wildfires rage across the US state in 2018 A firefighter lights a backfire in the city of Redding Getty California in flames: wildfires rage across the US state in 2018 The Carr Fire burns near Whiskeytown AP California in flames: wildfires rage across the US state in 2018 Firefighters try to limit the spread of the Carr Fire by backburning Getty California in flames: wildfires rage across the US state in 2018 Flames flare in the Cajon Pass near San Bernardino AP California in flames: wildfires rage across the US state in 2018 An firefighting aircraft drops fire retardant to slow the spread of the River Fire near Lakeport Reuters California in flames: wildfires rage across the US state in 2018 A schoolhouse burns in the Carr Fire in Shasta County AP California in flames: wildfires rage across the US state in 2018 The Carr Fire burns along Highway 299 by the city of Redding AP California in flames: wildfires rage across the US state in 2018 A car is seen amongst the devastation left by the Cranston Fire EPA California in flames: wildfires rage across the US state in 2018 A firefighter waters down a backfire on Cloverdale Road in Igo AP California in flames: wildfires rage across the US state in 2018 Firefighters convene while battling the Carr Fire in Shasta County AP California in flames: wildfires rage across the US state in 2018 Firefighters assess the damage in San Bernardino County AP California in flames: wildfires rage across the US state in 2018 The Carr Fire burns along Highway 299 by the city of Redding AP California in flames: wildfires rage across the US state in 2018 The Carr Fire burns along Highway 299 in Shasta County AP California in flames: wildfires rage across the US state in 2018 The land around Mountain Centre has been left devastated by the Cranston Fire EPA California in flames: wildfires rage across the US state in 2018 Firefighters battle the Carr Fire in the town of Redding AP California in flames: wildfires rage across the US state in 2018 A home burns in Redding Getty California in flames: wildfires rage across the US state in 2018 The Cranston Fire burns south of Idyllwild AP California in flames: wildfires rage across the US state in 2018 The Carr Fire burns through the town of Shasta AP California in flames: wildfires rage across the US state in 2018 A home burns in Redding Getty California in flames: wildfires rage across the US state in 2018 A collection of antique cars has been destroyed by the fire in the town of Redding Getty California in flames: wildfires rage across the US state in 2018 A home on Sunflower Road in Redding burns in the Carr Fire Getty California in flames: wildfires rage across the US state in 2018 A helicopter aids utility workers as they work to repair burned power lines EPA California in flames: wildfires rage across the US state in 2018 A home burns in Redding Getty California in flames: wildfires rage across the US state in 2018 The Carr Fire burns along Highway 299 by the city of Redding AP California in flames: wildfires rage across the US state in 2018 Sunflower Road in Redding burns in the Carr Fire Getty

The children’s mother, Sherry Bledsoe, was quoted by the Sacramento Bee as saying: “My kids are deceased. That’s all I can say.”

Ms Bledsoe’s husband cried as he recalled trying to get back to the house on Thursday after leaving to go to the shop. Ed Bledsoe discovered police had already closed the roads and he was not allowed through. He said he spoke to the children on the phone until they succumbed to the fire.

Shasta County Sheriff Tom Bosenko told a news conference near the city of Redding at the edge of the blaze on Sunday one more person had been killed in a residence consumed by fire, bringing the total to six, including two firefighters. He said the latest victim had not complied with an evacuation order.

Positioned around 150 miles (240 km) north of Sacramento, the Carr Fire is the deadliest of the 90 wildfires burning across the US. Wildfires have blackened 4.4 million acres (1.8 million hectares) of land in total so far this year, around 20 per cent more than the average.

More than 3,000 firefighters battling the Carr Fire had begun to make progress on Sunday afternoon, cutting containment lines around 17 per cent of its perimeter, according to the California Department of Forestry and Fire Protection.

Gale force winds that drove the fire into a frenzy last week have eased, but temperatures are again expected to exceed 37.8C, according to the National Weather Service.

Even so, firefighters say they still face difficult conditions on the western flank of the blaze, where the terrain is steep and the air is thick with smoke.

“That’s why we need to fly,” Dominic Polito, who works for the Escondido Fire Department, said in an interview. “We can still use helicopters, but we can’t use the fixed-wing aircraft.”

Firefighting officials on Sunday said they would begin to return people to their homes as soon as possible.

The fire grew rapidly beginning on Thursday, confounding fire officials with the speed of its movement.

All told, nearly 1,000 buildings have been destroyed in the blaze, which has prompted President Donald Trump to issue an emergency declaration that allowed federal money to be spent on efforts to contain the fire. Included in those 1,000 buildings was the entire town of Kenswick, where 450 people live.

Meanwhile, residents have also been rushing to keep their horses and livestock safe from the blaze as it runs through the rugged region known usually as a popular fishing destination.