Creek Fire (2020)

Animation of the formation of a pyrocumulonimbus above the 2020 Creek Fire in California

The fire began around 6:40 PM PDT on Friday, September 4, 2020, in the Big Creek drainage area between Shaver Lake and Huntington Lake, California. Driven by powerful diurnal upcanyon winds within the San Joaquin River drainage, the Creek Fire quickly became a firestorm, with NASA documenting that the fire created a pyrocumulonimbus cloud (pyroCb), believed to be one of the largest pyroCb events seen in the United States, likely due to the sheer size of the fire.[11] The fire was being fed in part by these clouds, as they generated rain and wind, giving the fire more oxygen, and allowing it to jump fire lines.[12] The fire has been characterized as a plume-dominated blaze, where the environment allows for the continued upward blowing of smoke and the vertical transfer of heat causing extreme fire behavior. Such behavior was seen as multiple fire tornadoes were observed through Doppler weather radar data.[13]

Within the initial 4 days of sparking, the Creek Fire rapidly exploded, expanding anywhere between 20,000 acres (81 km²) to 50,000 acres (200 km²) each day from September 4–9. The main reasons for this explosive behavior were strong, gusty winds pushing east from the Sierra Nevada and also the pileup of about 150 million dead trees in the mountains due to the 2011-17 California drought and the infestation of bark beetles. These dead trees acted as fuel for the fire.[14] With over 290,000 acres (1,200 km²) burned on September 23, the Creek Fire became the largest single blaze in the history of California.[15]

The Creek Fire also spawned two massive fire whirls one on September 7, an EF-2 near Huntington Lake with 125 mph winds, and the second an EF-1 near Mammoth Pool with 100 mph winds, on September 5. The tornadoes caused damage like uprooting pine trees and other smaller trees as well as stripping their bark. These firenadoes were formed due to the intense heat the fire had generated, which pulled in smoke, fire, and dirt creating rotation vortices.[16] The Mammoth Pool firenado trapped hundreds of campers in that area, while the Huntington Lake one caused severe damage to trees in the Camp Silver Fir, B.S.A. & Kennolyn Camps area, that continued to attack their root systems a week later, burning underground at over 1,500 °F (820 °C).[17]

Over the next month, the Creek Fire continued to grow in size, exceeding 300,000 acres (120,000 ha) on September 27. In October, most of the new growth in the Creek Fire was coming from the eastern flank of the fire, which was expanding towards Mono Hot Springs and Lake Thomas A Edison. In late October 2020, the Creek Fire became the fourth-largest fire in the recorded history of California.[6] On October 26, the Creek Fire had grown to 369,362 acres (149,475 ha), while containment was at 63 percent.

Full containment was expected around November 30,[18] however, the fire persisted for another month, before it was fully contained on December 24.[19]

On September 5, hours after the fire broke out, the Fresno County Sheriff's Office closed Shaver Lake, a popular destination for boating and camping. The California Highway Patrol also shut down California State Route 168 for access only to emergency responders and evacuees.[20]

On September 7, California governor Gavin Newsom issued a state of emergency for the Creek Fire in the Fresno, Madera, and Mariposa counties, as the fire crossed State Route 168 and was rapidly moving southward, threatening the community of Shaver Lake. The town of Big Creek was already decimated on September 5. 1,000 firefighters were called to fight this fire, which was already 78,000 acres (320 km²) large with no containment, moving quickly towards cabins, homes, and shops.[21]

Firefighters extinguish a controlled burn to stop the spread of the Creek Fire

Fire progression map of the Creek Fire, on October 26, 2020

Scores of people were airlifted from hiking trails within the Sierra National Forest in the early days of the fire, with at least 150 people and some dogs evacuated by September 8.[22] The fire had initially trapped about 1,000 people near Mammoth Pool Reservoir after it jumped the San Joaquin river, with at least 200 individuals trapped at a boat launch.[13]

On September 9, at least 60 homes were destroyed and 278 commercial-residential structures were destroyed along with the historic Cressman's General Store, a local-landmark.[23] On September 9, the fire reached explosives stored by the China Peak Mountain Resort that were used to control avalanches causing the cache to explode. Firefighters had been warned of the cache and evacuated prior to the fire reaching the explosive materials.[24]

On September 22, the fire had destroyed more than 855 structures and forced the evacuation of over 30,000 people in Fresno and Madera Counties.[1][25] Smoke from the fire, worsened the air quality in the Central Valley area and caused an increase in at-risk individuals and children to be affected by respiratory issues and an increase in the use and prescribing of inhalers.[26] On September 17, the Boy Scouts of America - Southern Sierra Council announced that the fire had badly damaged Camp Kern, with some significant structures fully destroyed by the fire.[27]

Multiple organizations and locations housed pets and livestock during the evacuations, such as the Fresno Fairgrounds,[28] Clovis Rodeo Grounds and local high schools.[29] The Red Cross organized hotel rooms for evacuees; group shelters were not an available option due to COVID-19 pandemic social distancing requirements.[23]

On September 15, Gavin Newsom and California senator Kamala Harris travelled to Fresno County to survey Creek Fire damage. They were met with both supporters and protestors. They talked to first responders about their efforts to fight the fire, as well as wildfire evacuees.[30] They also addressed climate change as a major problem facing California and the country, helping to fuel wildfires like the Creek Fire.[31] However, an Auberry family accused the pair of using their property for photo-op purposes, merely to push their political agenda, before even the family themselves could survey the damage.[32][33]

• 2020 California wildfires
• List of California wildfires

Wikimedia Commons has media related to Creek Fire (2020).

• Cal Fire incident page