WorkSafe New Zealand issues safety alert after hot work incident

WorkSafe New Zealand has issued a safety alert reminding businesses of the serious health and safety risks involved when carrying out hot work. The regulator issued the alert following a recent incident, and this guide breaks down what happened and what employers need to know.

What Happened in the Hot Work Incident?

WorkSafe said a worker was recently treated in hospital after a serious incident involving hot work being performed on an oil drum. The worker suffered minor injuries, but potential existed for more serious injury or a fatality caused by an explosion and/or fire, according to the safety regulator.

According to WorkSafe, the worker assumed the drum contained water and did not bother to check before starting the job. This assumption proved dangerous, since drums used for storing hazardous substances can retain flammable residue long after their original contents have been emptied.

Why Hot Work Requires Careful Planning

This incident shows why it remains essential for employers to ensure workers stay aware of the dangers of hot work. Hot works can trigger explosions when performed near hazardous substances, gas residue, or unknown liquids without proper checks beforehand.

Businesses should treat every drum, tank, or container as potentially hazardous until confirmed otherwise. A documented Hot Work Permit process helps workers verify contents, ventilation, and fire risks before any welding, cutting, or grinding begins.

Key Steps for Managing Hot Work Safely

• Confirm the true contents of any drum or container before starting work
• Check for residual fumes or flammable material, even in containers that appear empty
• Follow a documented permit system for all hot work tasks
• Train workers to recognise signs of hazardous substances near job sites
• Report incidents promptly to support ongoing investigation and prevention efforts

Supporting Health and Safety Compliance

Protecting worker health depends on consistent hazard identification, especially where flammable materials or asbestos may be present in older equipment or structures. Employers managing renovation or demolition work alongside hot works should also account for asbestos risks, since asbestos fibres can become airborne during cutting or grinding tasks.

A robust safety management approach combines training, permits, and clear reporting lines. For businesses seeking a practical safety documents guide tailored to New Zealand requirements, SafetyDocs offers templates covering hot work, asbestos management, and broader health and safety obligations.

WorkSafe New Zealand has launched several safety alerts in recent years addressing similar workplace incidents, reinforcing that hazard awareness saves lives. Additional information on the above safety alert is available on the WorkSafe New Zealand website.

Related Safety Alerts Worth Reviewing

• NSW Resources Regulator issues safety alert after worker suffers burn injuries during hot work
• WorkSafe issues safety alert following gas cylinder explosion in work vehicle

Building a Stronger Safety Culture

Health and safety outcomes improve when businesses treat every job with the same level of caution, regardless of how routine it seems. Asbestos exposure, hazardous substances, and hot work hazards all share one common thread: complacency creates risk.

For New Zealand employers wanting a structured management systems guide, or those operating within hospitality and similar sectors needing tailored HSWA compliance guide documentation, SafetyDocs provides resources built around current regulatory expectations.

Every incident investigation offers a guide for future prevention. By treating this hot work event as a learning opportunity rather than an isolated case, employers across construction, manufacturing, and healthcare sectors can strengthen their own hazard controls, particularly around asbestos-containing materials and other hazardous substances commonly found in ageing infrastructure.