Write a risk assessment for weather hazards high wind, reduce visibility

Adverse weather involving high winds and reduced visibility can create a high-risk work environment because workers may lose balance, be struck by airborne objects, experience eye or respiratory exposure to dust and debris, face equipment or scaffold instability, and encounter downed power lines, falling trees, broken glass, or vehicle incidents. Reduced visibility from dust, snow, rain, or fog also increases the risk of struck-by events, especially around traffic and mobile equipment. [1] [6]

A practical risk assessment should identify the main hazards, rate the risk, and stop work immediately where the risk is high.

Use a structured risk assessment process for each task. Consider severity and likelihood, then assign a risk priority. If the risk is high, suspend the activity until effective controls are in place. Medium risks require prompt controls using engineering, administrative, or PPE measures. PPE should be selected only after trying to reduce exposure through engineering and work-practice controls, and it must match the hazard, fit properly, and be incorporated into the documented hazard assessment. [5] [5] [5]

Key hazard identification points:

• Falls or loss of balance on roofs, ladders, scaffolds, aerial lifts, and other elevated work areas
• Airborne tools, materials, dust, branches, fencing, or unsecured items striking workers or the public
• Equipment instability or tip-over involving cranes, aerial lifts, scaffolds, trucks, trailers, and temporary structures
• Reduced visibility causing vehicle collisions, struck-by incidents, and poor communication
• Downed or contacted power lines causing electrocution and fire
• Doors, sheets, plywood, and other large surfaces acting like sails and pulling workers off balance
• Weather-related deterioration of conditions during the shift, including gusts stronger than average wind speed

[3] [4] [6] Recommended control measures:

• Monitor forecasts and actual site conditions continuously; do not rely only on the initial weather check
• Set task-specific wind and visibility stop-work thresholds before work begins, using manufacturer limits and site rules
• Eliminate or postpone tasks that become unsafe in high winds or poor visibility
• Secure loose materials, tools, doors, ladders, scaffolds, fencing, and temporary works; bring movable items indoors or tie them down with weights, ropes, chains, or stakes
• Use anemometers or equivalent monitoring to measure wind speed and account for gusts
• Restrict or stop lifting operations, crane use, suspended work platforms, and similar activities when unsafe
• Keep workers away from trees, unstable structures, glazing, and areas exposed to falling or wind-driven debris
• Control traffic and mobile equipment interactions, and reduce dust where visibility is affected
• Use barriers, exclusion zones, and spotters where visibility or line-of-fire hazards exist

[2] [2] [3] [4] [15] Safe work procedures should be written into the job plan and briefed before work starts.

• Complete a pre-job weather review covering forecast wind, gusts, precipitation, visibility, traffic exposure, nearby trees, overhead lines, and temporary structures
• Inspect the work area before each shift and after weather changes for unsecured materials, scaffold condition, fencing, access routes, and electrical hazards
• Establish clear stop-work criteria for high winds, gusts, and reduced visibility, and communicate who has authority to stop the job
• Suspend roof work, scaffold work, aerial lift work, and other elevated tasks when weather conditions make footing, stability, or fall protection unreliable
• Tether tools where appropriate and stage materials so they cannot blow, slide, or create trip hazards
• Maintain safe distances from power lines and mark or barricade danger zones
• For road or mobile plant work, keep workers inside the work zone, face oncoming traffic where appropriate, minimize reversing, and use trained traffic control personnel or signallers as needed
• Use spotters and reliable communication methods when visibility, noise, or wind interferes with normal signals

[2] [9] [13] [12] [15] A dynamic risk assessment is essential because wind and visibility can change rapidly. Reassess conditions throughout the shift, especially when gusts increase, precipitation starts, dust rises, visibility drops, or work location changes. Workers and supervisors should be empowered to pause work immediately if conditions exceed the planned limits, if communication breaks down, or if controls such as tie-downs, exclusion zones, or fall protection are no longer effective. [2] [6] [10]

Emergency response considerations:

• Stop work, account for personnel, and move to a safer sheltered location away from windows, outside walls, unstable structures, trees, and suspended loads
• If outdoors and shelter is unavailable while driving, remain in the vehicle if it is safer to do so and avoid areas where trees or power lines may fall
• Isolate and report downed power lines; keep workers and equipment clear until the utility authority confirms the area is safe
• If a scaffold, lift, crane, or temporary structure becomes unstable, evacuate the exclusion zone and prevent re-entry until inspected by a competent person
• Provide first aid for trauma, eye injuries, and exposure to dust or debris, and summon emergency services promptly for serious injury or electrical contact
• After the event, inspect the site before restarting work and only resume when hazards are controlled

[3] [2] [1] [10] PPE requirements should be based on the hazard assessment and task.

• Eye protection such as safety glasses or goggles to protect against blowing dust and debris
• Head protection and protective footwear appropriate to the worksite
• High-visibility garments where reduced visibility or vehicle exposure exists, especially around roads, mobile equipment, or low-light conditions
• Fall protection for work at height, including properly selected and anchored systems where required
• Weather-appropriate clothing for cold, rain, or exposure, and secure PPE so it is not dislodged by wind
• Task-specific PPE such as insulated outerwear or high-visibility torso protection where the assessment identifies those hazards

[2] [2] [8] [14] [7] For compliance, employers should ensure the assessment and controls align with applicable occupational health and safety duties to identify hazards, assess risk, implement controls, provide training, inspect equipment, follow manufacturer limits, and stop unsafe work. Particular attention is required for scaffolds, aerial lifts, lifting operations, traffic control, fall protection, and worker visibility. Where jurisdiction-specific rules apply, follow the stricter requirement, including manufacturer wind thresholds and any legal requirements for competent-person determinations, fall arrest, traffic control training, and high-visibility apparel. [10] [9] [14] [11]

In practice, adverse weather work should proceed only when the residual risk is acceptable after controls are applied. If high winds or reduced visibility create uncontrolled fall, struck-by, tip-over, electrical, or traffic hazards, the safest and compliant decision is to delay, suspend, or stop the work until conditions improve and the site is made safe. [3] [5]