Hot Work Risk Assessment Toolbox Talk

Every hot work task should begin with a thorough risk assessment. Welding, cutting, grinding, brazing, soldering, and similar activities introduce ignition sources that can create serious fire, explosion, burn, and health hazards. Identifying these risks before work starts allows the crew to implement the proper controls and complete the job safely.

This toolbox talk reviews how to conduct a hot work risk assessment, identify hazards, and ensure appropriate control measures are in place before any work begins.

Why This Matters

• Hot work is a leading cause of workplace fires and property damage.
• Many incidents occur because hazards were overlooked during planning.
• A risk assessment helps eliminate hazards before they become emergencies.
• Changing site conditions may require the assessment to be reviewed throughout the job.
• Every worker has a responsibility to identify and report hazards.

Common Hazards

• Combustible materials located within the spark or heat zone.
• Flammable gases, vapors, liquids, or dusts.
• Confined or poorly ventilated work areas.
• Hidden combustibles inside walls, ceilings, floors, or equipment.
• Overhead work exposing workers below to sparks or molten metal.
• Damaged welding, cutting, or grinding equipment.
• Nearby pressurized cylinders, fuel sources, or chemical storage.
• Inadequate emergency access or fire protection equipment.

Safety Checklist

Before Work Begins

• Complete a task-specific risk assessment before starting hot work.
• Determine whether hot work can be avoided by using a safer alternative.
• Inspect the work area for combustible and flammable materials.
• Verify adequate ventilation and atmospheric conditions where required.
• Ensure the required hot work permit has been issued, if applicable.
• Confirm suitable fire extinguishers are available and accessible.
• Assign a fire watch when required by site procedures or the permit.
• Review emergency procedures, communication methods, and evacuation routes.

During Work

• Monitor the work area for changing conditions or new hazards.
• Keep combustible materials outside the spark and heat zone whenever possible.
• Maintain good housekeeping throughout the task.
• Use the required personal protective equipment.
• Stop work immediately if conditions change or controls are no longer effective.
• Inspect the area after completion to ensure no fire hazards remain.

Crew Talking Points

• What are the primary fire and explosion hazards for today's task?
• Has the required hot work permit been issued?
• What controls have been put in place to eliminate or reduce the risks?
• Who is serving as the fire watch, if required?
• What emergency procedures apply if a fire or other incident occurs?
• Speak up immediately if you identify a hazard that is not addressed by the risk assessment.

Stop Work If

• A required risk assessment has not been completed.
• A hot work permit is required but has not been authorized.
• Combustible or flammable hazards cannot be adequately controlled.
• Required fire protection equipment or fire watch personnel are unavailable.
• Ventilation becomes inadequate or atmospheric conditions become unsafe.
• New hazards develop that are not covered by the existing controls.

Final Reminder

A thorough risk assessment is the foundation of safe hot work. Identify hazards, implement effective controls, communicate the plan to the crew, and never begin hot work until the risks have been properly managed.