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Building Fireline Downhill With Fire Below

 

Building fireline downhill requires special attention to safety factors because of the potential for rapid uphill fire spread. This Watch Out depicts firefighters building fireline downhill without first mitigating the existing hazards.

9. Building fireline downhill with fire below. Three firefighters use tools to dig fireline down a steep slope covered in grass and brush.  Large flames are below them as the fire burns uphill.

9. Building fireline downhill with fire below. 

Read about all 18 Watch Out Situations.
 

As a rule, construct line moving uphill: Many firefighters have lost their lives attacking wildland fires from above. If there is no practical alternative to constructing line downhill, proceed only after weighing the following considerations:

  • Has the area been scouted for fire perimeter and behavior? Discuss what you need to know about the fire perimeter and fire behavior before building fireline downhill with fire below.
  • Will the wind direction be at your back? Will it stay at your back? Talk about how winds can change when you are on a slope (e.g., time of day, upslope and downslope breezes, etc.).
  • Is the area free of chimneys and gullies? How would you negotiate your line location if there were chimneys and gullies below where you want to work?
  • Are there adequate safety zones and escape routes? How do you maintain adequate safety zones and escape routes as you progress downhill?
  • Can you complete the burnout downhill as you work, providing an anchor point and safety zones? Discuss how you decide to carry the burnout with you or wait until you have tied into a fireline down below.
  • Have lookouts been posted? What should they be monitoring?
  • Have you established good communications? What are some of the dangers of poor communication with lookouts and crews working towards you? Describe the benefits of maintaining good communications.
  • Can the line be completed and burned out before the fire reaches it? Discuss how this would affect where you locate the line.
  • Do you have adequate resources to complete the assignment? What additional resources might you need to safely take on an assignment that includes building fireline downhill with fire below? How many resources do you want to engage?
  • Is aerial support available if needed? What benefits can aerial resources provide? What might be an added danger from aerial resources in this type of situation (common denominators)?
  • Has everyone been briefed on the assignment, fire behavior, weather, communications, escape routes and safety zones, hazards, and tactics? Discuss who might provide this briefing, where they would receive their information, and where and when it might occur.

References:

Category
Operational Engagement

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NWCG Latest Announcements

NEW! S-212, Intermediate Faller (Online) Course Available Now 

Date:  April 23, 2026
Questions? 
Please contact: Hazard Tree and Tree Felling Subcommittee

NWCG is pleased to announce that the new S‑212, Intermediate Faller (Online), course is now available on the Wildland Fire Learning Portal (WFLP). This second course in the series provides students with the knowledge and skills required to perform the duties of an Intermediate Faller (FAL2), as described in the FAL2 Incident Position Description. This course is intended for individuals seeking to advance from Basic Faller (FAL3) to FAL2.

S‑212, Intermediate Faller is a fully online, self‑paced training program consisting of 13 units. Learners will engage with interactive, scenario‑based content designed to progressively build foundational skills and knowledge essential for the FAL2 role.

Students must be qualified as a Basic Faller (FAL3) prior to enrolling in S‑212, Intermediate Faller course.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1, scheduled for January 2027.

References:

S-212 Intermediate Faller (Online)

RMC Memo 26-01: Transition Plan for Implementing Updates to Intermediate Faller (FAL2) Position Qualifications

Intermediate Faller (FAL2) Position Page

NWCG Standards for Wildland Fire Chainsaw Operations, PMS 212

New Aircraft Flight Schedule Form, PMS 249

Date:  April 17, 2026
Questions? 
Please contact: National Coordination System Committee

A new publication from the National Coordination System Committee (NCSC) is now available. The NWCG Aircraft Flight Schedule Form, PMS 249, will be used for aviation crews and dispatch to share flight information that is needed for resource tracking, and if needed, for emergency procedures.

For further details, please contact your NCSC representative. 

References:

NCSC Memo 26-01: Implementation of NWCG Aircraft Flight Schedule Form, PMS 249

NWCG Aircraft Flight Schedule Form, PMS 249

New Glossary Term for Review

Date:  April 15, 2026
Questions? 
Please contact: Data Standards and Terminology Board (DSTB)

The Data Standards and Terminology Board is requesting feedback on a new glossary term: Resource Protection Measure (RPM).

The proposed definition is: Practical guidance provided for incident personnel in a manner in which incident objectives can be achieved while reducing impacts to identified resources across the landscape. RPMs are informed by, but not restricted to, Minimum Impact Strategies and Tactics (MIST).

Please review, share with your subgroups, and provide feedback as appropriate through the following form: Request Feedback The comment period will close May 10, 2026.

Thank you for your engagement in the NWCG glossary process – your participation is key to our success.

References:

Glossary Request Feedback

Quarter Three Materials for the 2025-2026 Wildland Fire Leadership Campaign Now Available

Date:  April 1, 2026
Questions? 
Please contact: Leadership Committee

NWCG is excited to announce that Quarter Three materials for the 2025/2026 Wildland Fire Leadership Campaign are now available. This annual initiative offers all students of leadership and wildland fire management an opportunity to engage with essential leadership skills and knowledge needed to lead effectively in dynamic environments.

Quarter Three materials focus on Leadership Level 3: Leader of People (Develop Intent). Leadership Level 3 is where your values, your team, and your influence come together. Leaders of People put their teams first, build trust, and lead with authenticity. They mentor future leaders and shape decisions up and down the chain.

References:

2025/2026 NWCG Leadership Campaign - Leadership Levels

Wildland Fire Leadership Development Program

Leadership Committee