"One of the issues we're running into is, clearly, some of the structures have been completely destroyed, where they're down to the foundations," said fire spokesman Paul Lowenthal.
"We've been holding off on giving the numbers out as far as whether they're residences, outhouses, garages, because just looking at a concrete slab doesn't really give us a good idea," he said.
Damage assessments teams will survey the area on Tuesday.
The commander of the vast firefighting operation expressed a positive outlook for the first time in the week since the blaze erupted in the Angeles National Forest north of Los Angeles and grew into a giant.
"I'm feeling a lot more optimistic today than I did yesterday and the crews are doing fabulous work out there on the grounds but the bottom line is that they're fighting for every foot," said Mike Dietrich of the U.S. Forest Service.
The latest on the fire is as follows:
- 127,513 acres burned
- 22 percent contained
- 12,000 homes threatened
- 62 structures destroyed
- Approximately 4,000 people evacuated
- 3,655 fire personal on scene, 399 fire engines
The fire has burned through the Angeles National Forest from Acton over the San Gabriel Mountains, south to Sunland-Tujunga, and east above La Crescenta, La Canada and Altadena toward Mount Wilson.
Lowenthal said the blaze had movement to the east and to the northeast overnight Monday.
Fire officials have been saying this fire has a mind of its own, and with plenty of dry brush around, more evacuation orders have been issued.
More than 300 homes in a neighborhood in Tujunga were ordered to clear out on Monday night, as flames danced around hillsides in the city.
"We're all in this together, and I'm ready for this to be over," said Tujunga resident Vince Valdivia.
Some residents scrambled to pack up their valuables and headed to an evacuation center, while others opted to stay in their homes.
"I'm pretty much gonna wait until the end until it's really, really bad. I shouldn't stay here, but I'm gonna," said Tujunga resident Gayane Gevorkyan.
"We just want to stay until probably the last minute," added Tujunga resident Helana Gevorkyan.
According to fire officials, more than three dozen cabins, homes and other structures were destroyed in the big Tujunga area over the weekend.
"I think the hardest part is we know we can't get back in, which is why we haven't left yet. Otherwise, we would have left," said Tujunga resident Jan.
Tujunga resident Scott Frastaci has lived in the area for more than 30 years and remembers the fires coming toward his house in 1975.
"We had huge black smoke blowing over the neighborhood, at 3 o'clock in the afternoon, had to have headlights on, and they're evacuating everybody then, but my father and I refused to leave because we wanted to water the old shake shingle roofs that you had back then," he said.
Officials warned that those who don't follow mandatory evacuation orders are putting their lives at risk.
"As the Sheriff said, he'll take their next of kin and ask where their dental records are stored, and we'll go back in after it. We can't be their guardians or parents," Dietrich said.
Fire crews set backfires and sprayed fire retardant at Mount Wilson, home to at least 20 television transmission towers, radio and cell phone antennas, and the century-old Mount Wilson Observatory. It also houses two giant telescopes and several multimillion-dollar university programs in its role as both a landmark for its historic discoveries and a thriving modern center for astronomy.
If the fire damages the ABC7 tower, fire coverage will be streaming live on abc7.com.
At least 3,600 firefighters are on the fire lines. Crews on Tuesday will have the assistance of a 747, which is able to drop about 20,000 pounds of retardant onto the fire.
Dehydration is a concern for firefighters, as they work 12-hour shifts. One firefighter was treated for kidney failure, but he is expected to be OK.
Firefighters are not getting much help from Mother Nature. The relative humidity is up, but the heat lingers.
"The heating from the ground will actually push the hot air up into the clouds and that's what produces the potential for cumulus clouds, and that's the potential for the dry lightning," Dietrich said.
Mandatory evacuations issued for the following areas:
- Soledad Canyon Road between Agua Dulce Canyon Road and Crown Valley Road
- Area bounded by Soledad Canyon Road, Aliso Canyon Road and Angeles Forest Highway
- Soledad Canyon Road/Bootlegger Canyon Road area
- Little Rock Recreation Area
- Mount Emma Road
- Cheseboro Road
- Cima Mesa area northwest of Juniper Hills
- South of Fort Tejon Road from Mount Emma Road to Longview Road
- Big Tujunga Canyon Road from Mount Gleason to Angeles Forest Highway
- Chantry Flats
- Little Tujunga Canyon Road north of the Little Tujunga Ranger Station and Gold Creek Road
- Prieto Fire Road and Millard Canyon north of Risinghill Road
- Chaney Trail and Alzada Drive north of Jaxine Drive
Northwest of Day at Blue Gum Canyon Road, to Glory Avenue, to westbound Apperson Street, to northbound Fairgrove Avenue, to westbound Summitrose Street, to northbound Pinyon Avenue, to westbound Hillrose Street, to northbound Sevenhills Drive, to Lonzo Street.
- South side of Markridge
- Top of Boston, north of Markridge
- Top of Dunsmore, north of Markridge
- North of Santa Carlotta Avenue, between Lowell Street and Pennsylvania Avenue
- La Canada High School, 4463 Oak Grove Drive
- Crescenta Valley High School, 2290 Community Ave., La Crescenta
- Golden Valley High School, 27051 Robert C. Lee Parkway, Santa Clarita
- Verdugo Hills High School, 10625 Plainview Ave., Tujunga
- Marie Kerr Park, 39700 30th Street West, Palmdale
Animal Evacuation Centers:
- Antelope Valley Fairgrounds; 2551 W. Avenue H, Lancaster (Large animals)
- Hansen Dam Equestrian Center, 11127 Orcas Ave., Lakeview Terrace (Large animals)
- Pierce College, 6201 Winnetka Ave. (Horses, donkey and mules only)
- Loma Alta County Park, at Lincoln Avenue and Loma Ala Drive, and La Canada High School
- Lancaster Animal Shelter and Agoura Animal Shelter (Small animals)
- Pasadena Humane Society (Small animals)
- Baldwin Park Shelter (Small animals)
- Los Angeles County Animal Shelter (Small animals)
- Agoura Hills Animal Shelter (Small animals)
- Sunland Park, along Foothill Boulevard near Sherman Grove Avenue (Small animals)
For more information on evacuation centers, the U.S. Forest Service urges residents to contact the American Red Cross at (888) 737-4306.
Evacuations are lifted for the following areas:
- Highrim Road
- Manistee Drive
- Derwood Drive
- Bristow Drive
- Normanton Drive
- Earnslow Drive
- Fairhurst Drive
- Rock Castle Drive
- Canalda Drive
- Ocean View north of Canalda Drive
- All evacuation orders in La Crescenta have been lifted
- W. Loma Alta Drive between Aralia Road and Fair Oaks Avenue
Fire officials say they are looking to lift evacuations in the Alpine Village area and the community directly to the south in the near future.
The Associated Press contributed to this story.