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Some evacuation orders were lifted early on Friday in an area near the fiercest of several wildfires in San Diego County, as crews building containment lines around the blazes hoped cooler temperatures would help them make further progress.
County officials said residents of two neighbourhoods in San Marcos had been allowed to return home. A flare-up on Thursday in the north San Diego suburb prompted more than 18,000 new evacuation notices as flames raced through tinder-dry brush on hillsides. That fire was 10% contained on Friday morning.
Nine fires have destroyed at least eight houses, an 18-unit condominium complex and two businesses since Tuesday. The hardest-hit areas were in San Marcos and Carlsbad, a suburb of 110,000 people that lifted evacuation orders late on Thursday.
Firefighters found a badly burned body onThursday in a transient camp in Carlsbad – the first apparent fatality – and a Camp Pendleton Fire Department firefighter was treated for heat exhaustion.
To the north, crews battled two fires at Camp Pendleton, including one that broke out on Thursday and grew overnight from 600 acres to 8,000, base officials told KGTV. It was 10% contained. The second fire, sparked on Wednesday on the eastern outskirts of the Marine base, scorched nearly 10 square miles of dry brush. That blaze was 15% contained.
This week's unseasonably early wildfires have driven tens of thousands from their homes and shut down schools and amusement parks, including Legoland, which reopened on Thursday. Flames have caused more than $20m in damage.
Firefighters who have worked in temperatures sometimes topping 100F (38C) this week were expected to get relief on Friday. The forecast called for temperatures to peak around 90F and lighter winds. A bigger cool-down was forecast for the weekend.
It could take months to find the causes of the blazes concentrated in the northern San Diego and its northern suburbs, from the coast to areas 10 to 15 miles inland. San Diego County Sheriff Bill Gore said arson will be among the many possibilities investigators will look at.
Crews along with engines and aircraft were ready to spring into action when the first fire ignited on Tuesday, after being sent to the region in anticipation of a heat wave and gusty winds.
The positioning of crews was among several steps fire officials say they have been fine-tuning since 2003, when the San Diego area experienced one of the worst fires in California's history. Communications between firefighting agencies has improved, residents are notified more quickly when to evacuate, and more aircraft are available to dump water on fast-moving flames.
San Diego County had some of the strongest Santa Ana winds on Wednesday, with gusts reaching up to 50mph, which may have set conditions for fires to be easily ignited, just as they were in 2003. The 2003 Cedar Fire scorched more than 437 square miles, nearly 3,000 buildings – including more than 2,000 homes – and killed 15 people.
The tragedy led to California creating one of the world's most robust firefighting efforts, which resulted in the smooth evacuation of thousands this week and crews able to save hundreds of homes from being consumed by the fast-moving wildfires, said Battalion chief Nick Schuler of the California Department of Forestry and Fire Protection.
Before another devastating wave of fires swept the San Diego region in 2007, the city and county introduced a “reverse 911” system of automated calls to homes and businesses. Previously, evacuations were accomplished by going door to door or driving down the streets with loudspeakers.
Upgrades at dispatch centres have allowed firefighting agencies to share resources far more quickly by computer, a contrast to 2003 when agencies had to pick up the phone to move engines around, said David Allen, division chief for the state firefighting agency.
There is also a stronger relationship between the state firefighting agency and the military, which had 22 aircraft fighting the fires Thursday.
Those procedures are expected to be tested further as drought-plagued California heads into the summer months of what is expected to be one of its busiest firefighting seasons yet.
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