All but one fire burning in San Diego County have a suspicious ignition point, sources say

SAN DIEGO, Calif. - All but one of the fires that have been burning across San Diego County have a suspicious ignition point, according to sources who talked to 7NEWS' sister station KGTV.

"Fire bugs" is the term being used inside the fire agencies. Sources say the fires started in a way that were not normal -- there were no sparks from a lawnmower or car engine, no thrown cigarettes and no cars involved.

One source, a long-time arson investigator who is now retired, said that CAL FIRE has a crack investigative team that will be looking closely at physical evidence and talking to witnesses to try to determine exactly how these fires started. The San Diego Fire Department also has an investigative team that will be looking into this.

Locals will be asked if they saw anything suspicious or noticed strange activity in their area. The Carlsbad Police Department has already established a Tip Hotline for the Poinsettia Fire. Anyone with information can call (760) 602-7599 or send investigators an email.

Calmer winds allowed firefighters to make progress on nine fires burning in San Diego County, until one of the most serious blazes suddenly roared Thursday afternoon burning close to homes, triggering thousands of new evacuation orders and keeping the situation tenuous.

Growing flames raced along scrubby hillsides near the city of San Marcos as massive black plumes filled the afternoon skies after a half-day lull in winds that had allowed firefighters to gain ground against flames that have scorched thousands of acres this week.

Ash-laden smoke limited visibility to a few feet at times in the inland suburban community. On one semi-rural street, five horses wandered nervously in a paddock as firefighters worked to protect nearby homes and barns.

Sheriff Bill Gore said the flare-up prompted more than 13,000 new evacuation notices in the San Marcos area and served as a "reminder to everybody just how volatile this can be." The new evacuations were in addition to more than 20,000 orders issued Wednesday. About 85,000 people live in San Marcos.

Since the first blazed erupted Tuesday during a heat wave, officials have repeatedly predicted the worst was over only to be confronted by a new challenge amid the hot, dry and windy conditions.

The fires have destroyed eight houses, an 18-unit condominium complex and two businesses and burned more than 15 square miles, causing more than $20 million in damage so far.

The flare-up in San Marcos ran up a slope in a heavily vegetated area but with no wind on it. The fire was being driven by fuel and topography, said Division Chief Dave Allen of the California Department of Forestry and Fire Protection.

"It's created its own weather pattern there as it sucks oxygen in," he told a news conference.

State fire Capt. Kendal Bortisser said the fire was running east along hillsides behind California State University San Marcos.

The 1.56-square-mile blaze was only 5 percent contained. The fire, which broke out Wednesday, forced the evacuation of the university campus where nearly 10,000 students were in the middle of final exams. Graduation ceremonies were canceled.

Investigators were trying to determine the causes of the various fires.

Asked about the possibility of arson, the sheriff said he wouldn't prejudge the investigations. He noted that sparks from vehicles can easily ignite brush in such dry conditions.

Emergency officials said a significant number of firefighting aircraft had become available, including four air tankers and 22 military helicopters, in addition to local agency helicopters.

Ten of the military helicopters were being used to battle a blaze that grew to 9.37 square miles on the Marine Corps' Camp Pendleton. Despite its growth, the fire was 20 percent contained and was no longer considered a threat to communities.

Twelve other military helicopters were available to the county.

Since the fires began, 125,000 evacuation notices have been sent, officials said. Schools also have been shut down and the Legoland amusement park had to close Wednesday. It reopened Thursday.

Firefighters contended with temperatures approaching 100 degrees and gusty winds as they tried to contain flames fueled by brush and trees left brittle by drought.

There was extreme heat again Thursday, with temperatures ranging in the high 90s to 100 in the northwestern area of the county where the fires burned.

The heat was so intense that records continued to be broken, and horse racing was canceled at Santa Anita Park in Arcadia, east of Los Angeles.

Officials said a Carlsbad-area blaze that has been the most destructive so far was 75 percent contained and had burned 400 acres. The wildfire destroyed an 18-unit condominium complex and four residences, Carlsbad Mayor Matt Hall said.

Some evacuation orders were being lifted in Carlsbad, but hotspots were still a concern.

Numerous schools will be closed Friday, officials said.

California Gov. Jerry Brown declared a state of emergency on Wednesday, clearing the way for more resources to help local firefighters.

Watch live coverage of the fires from KGTV:

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