Chuckegg Creek Fire in Alberta grows to over half a million acres

Will it become a million-acre “gigafire”?

Map Chuckegg Creek Fire Northern Alberta
Map of the Chuckegg Creek Fire in Northern Alberta at 3:50 a.m. MDT May 30, 2019. The shaded areas represent heat detected by a satellite during the previous seven days.

The Chuckegg Creek Fire in Northern Alberta near the town of High Level was very active over the last 48 hours while being pushed by strong winds. Exhibiting extreme fire behavior, it grew to the south about 11 miles, and while moving 12 miles to the east it crossed Highway 35 and jumped the Peace River both north and south of the ferry crossing on Highway 697.

Alberta Wildfire estimated it has burned 230,000 hectares, or 568,000 acres.

Below is an excerpt from an update by Alberta Wildfire about the Chuckegg Creek Fire, issued May 30, 2019:

The Chuckegg Creek Fire experienced extreme fire behaviour yesterday with significant growth to the south towards Paddle Prairie, across Highway 35 by Highway 697 and spotted across the Peace River. Continued hot and dry conditions along with variable, gusty winds have proved a challenge to firefighting efforts and safety. Municipal firefighters and heavy equipment responded, with structure protection established as possible to the south of the fire. The fire also experienced growth to the west and continued fire activity on the north part of the fire around Watt Mountain.

Firefighters, heavy equipment, and aircraft are assessing the situation given the recent fire growth and will focus on priority areas. Structural protection and municipal firefighters are working to protect values. The weather forecast today anticipates cooler temperatures and higher minimum relative humidity, though winds today are expected to remain gusty and are expected to come primarily from the north.

I believe that the fire started during the week of May 12. It reached the 100,000-acre threshold to become a “megafire” on May 20. Now that it has easily grown to 568,000 acres, I wonder if it will reach a million acres to become a “gigafire”. A bushfire that started October 11, 2018 in Western Australia 120km southeast of Broome burned 880,000 hectares, or 2,174,527 acres.

The weather for the next seven days at the fire’s location will be variable, with a chance of rain on Saturday, Monday, and Thursday of next week, so there will not be many days conducive to explosive fire growth.

Bushfire in Australia burns over 2 million acres, becoming a “gigafire”

Bushfire Broome, Western Australia
Bushfire south of Broome, Western Australia. Photo: Department of Fire and Emergency Services.

A bushfire that started October 11 in Western Australia 120km southeast of Broome burned 880,000 hectares, or 2,174,527 acres. Dry winds from variable directions and high temperatures made it very difficult to suppress. The remote location and a lack of water restricted the tactics to fighting fire with fire, constructing firelines with heavy equipment, and using aircraft.

When the wind direction changed last week, firefighters had to shut down the Great Northern Highway, National Route 1.

bushfire Western Australia
Satellite photo of bushfire in Western Australia, October 15, 2018. NASA.

When we coined the term “megafire” for wildfires that exceed 100,000 acres, it was in the back of our mind that if a fire reached 1 million acres it would be called a “gigafire”.

In spite of the enormous size of the blaze in Western Australia there were no fatalities or damage to major structures.

The Department of Fire and Emergency Services (DFES) urged residents at Thangoo Homestead, Barn Hill Station, and Eco Beach last Tuesday to evacuate or actively defend their property.

DFES West Kimberley area officer Ben Muller said there were approximately 100 personnel fighting the fire.

The city of Broome was given the all clear Thursday morning.

Below is an excerpt from an article at TheWest.com:

Thangoo Station manager Rex McCormack said about half of the pastoral station was burnt but people and livestock were unscathed and water tanks and other important assets were undamaged.

“It is one of the biggest fires I remember from the last 10 years, but we felt safe in staying and defending the property,” he said.

“I didn’t feel scared in staying, I would have been more worried about that damage that could have occurred if I wasn’t there and it was more about being a resource to DFES.

“We were out back burning the property until about 1am last Wednesday, then up again at 6am.

Bushfire Broome, Western Australia
Bushfire south of Broome, Western Australia. Photo: Department of Fire and Emergency Services.

(UPDATED November 2, 2018)

Firefighters use innovative tactic to suppress Martin Fire

The fire has burned approximately 425,000 acres in Northern Nevada

(Originally published at 9:07 a.m. MDT July 10, 2018)

When a wildfire reaches 100,000 acres we often refer to it as a “megafire”. But what name do we put on a fire when it is four times the megafire threshold? The incident management team on the Martin Fire in Northern Nevada estimates their fire has burned approximately 425,000 acres. (I think we should reserve “gigafire” for a 1 million-acre fire.)

According to the National Situation Report there are only 634 personnel assigned. That is extremely low density of firefighters for such a huge fire — it stretches for 56 miles, west to east. Let’s assume for a moment that the perimeter is 150 miles (it is probably more). If so, that is about three people per mile of fireline, not including support personnel. However with mostly light fuels, there is less mop up after the spread is stopped, requiring fewer personnel.

map martin fire
The perimeter of the Martin Fire at 8:49 p.m. MDT July 10, 2018. The yellow line was from the previous day.

With the long distances, limited numbers of firefighters, and what may be difficult access, firefighters on the Martin Fire say they have developed an innovative approach to containing the blaze.

Firefighters know that air tankers and helicopters dropping water or retardant do not put out fires. Under ideal conditions they can slow them down enough to allow ground-based firefighters the opportunity to move in and actually put out the fire in that area. If there is no ground support working with the aircraft, the chances of success are very low. Reading between the lines of an update about the fire (embedded farther down) it appears that firefighters realized that in some instances the fire was spreading beyond retardant drops. It is not clear if the fire burned through the retardant, spotted over, or burned around the retardant.

martin fire retardant lines
Photo uploaded to InciWeb July 8, titled: “Martin Fire Crossing Retardant Lines”.

The tactic they decided to deploy involved using a combination of water-scooping air tankers, retardant-dropping air tankers, and firefighters building line on the ground. Aircraft that drop water, helicopters or fixed wing, apply it directly to the flaming front, since dropping it out ahead of the fire is often not effective since it does not adhere to the vegetation or have a long-term effect like retardant.

Here is how they described what they did:

Crews and equipment are making excellent progress building containment lines along the southeast flank of the fire. Due to the heavy, fine fuel loads, high winds and extremely fast fire rates of spread, an innovative tactic has been developed to combat these conditions using a three-prong attack. First, a long line of water is laid down by super scoopers, immediately followed by a retardant drop from air tankers. The approaching fire is thus cooled sufficiently that dozers and crews can safely and immediately dig a containment line right up against the side of the retardant line facing away from the flame front. Very close timing and coordination of air drops of water and retardant with ground forces has been proven to be the most effective tactic in these volatile burning conditions.

The part that may be innovative is slowing the flaming front with scooping air tankers AND then putting retardant just outside the edge of the fire. And as usual, quick followup by ground forces is essential.

Here are links to videos shot on the Martin Fire of drops by a DC-10 and two water scoopers.

Is it interesting that these firefighters, like many others in Canada and Europe, know that water-scooping air tankers are a very important tool in the toolbox. However, this year the U.S. Forest Service decided not to have any of them on exclusive use contract. The ones being used thankfully were available on a Call When Needed contract. And the number of retardant-dropping large air tankers on EU contracts were cut by one-third over last year.

They are also having success on the Martin Fire using a local task force:

Yesterday, fire spread slowed significantly due to the hard work of the local Elko Task Force that hit the head of the fire early Sunday morning and throughout the day. The task force took advantage of the fire naturally slowing as it entered flatter terrain with lesser fuel loads. Operations personnel report that the fire is moving into patches of greener vegetation such as Siberian wheat grass, which was planted as part of the BLM’s rehabilitation and fuel treatment efforts on previous fires. Green fuels slow the fire’s advance, making it easier for bulldozers and engines, with the aggressive assistance of super scooper air tankers and heavy and light helicopters, to catch up and get containment lines in place.

The head of the fire on the east side has approached and so far has not crossed the major drainage in the 3-D map below, thanks, no doubt, to the points brought out in the preceding quote.

map martin fire
A 3-D map showing the perimeter on the east side of the Martin Fire at 8:49 p.m. MDT July 10, 2018. The yellow line was from the previous day.

The Martin Fire is bringing in Beth Lund’s Type 1 Great Basin Management Team to handle the east side, while Taiga Rohrer’s Type 2 Great Basin Incident Management Team will continue to take care of the west side.