A year after The Workers Union launched warnings over dangerous workplace temperatures, the debate around working in extreme heat is moving back into the national spotlight.
In May 2025, The Workers Union published its campaign article, “As the heat rises: Why Britain needs a legal limit on working temperatures”, highlighting growing concern from UK workers across construction, warehouses, transport, manufacturing, logistics and office environments. The warning then was simple: Britain’s workplace laws had fallen behind modern climate realities.
Now, with forecasters at the MET office again predicting hotter summers and prolonged heatwaves across parts of the UK, new government proposals are beginning to emerge around worker safety during extreme weather conditions.
The issue is no longer theoretical.
For many UK workers, particularly those in physically demanding industries, heat exhaustion, dehydration and fatigue are becoming a real workplace concern. In sectors such as construction and delivery services, workers can spend long hours outdoors with limited shade or cooling facilities. Meanwhile, indoor workers in warehouses, kitchens and poorly ventilated offices are also reporting rising discomfort during summer periods.
The current UK legal framework still does not set a maximum legal working temperature. Unlike in Spain where there is legislation and a legal framework for working in heat which the UK could emulate. Existing UK regulations simply state that workplace temperatures must be “reasonable”.
That wording has increasingly come under scrutiny.
Recent discussions within government circles and workplace safety bodies have included proposals surrounding:
- Greater employer obligations during heat alerts
- Enhanced risk assessments during extreme temperatures
- Improved access to water, cooling areas and rest breaks
- Flexible working arrangements during severe heat
- Sector-specific heat guidance for outdoor workers
- Potential future reviews into enforceable upper temperature thresholds
While no fixed legal maximum has yet been introduced, pressure is clearly growing for clearer rules.
Experts have repeatedly pointed out that Britain’s infrastructure and many workplaces were never designed for sustained periods of high heat. Climate data continues to show rising average summer temperatures and more frequent heatwave events across the UK.
For workers, the practical impact can be immediate.
Heat-related fatigue can reduce concentration levels, increase workplace mistakes and heighten accident risks — particularly in safety-critical industries involving machinery, driving, lifting or public-facing responsibilities.
The Workers Union says the conversation must stay focused on practical worker protection rather than political point scoring.
Spokesperson for The Workers Union Jonathan Morgan said:
“UK workers should not have to choose between their health and their pay packet during periods of extreme heat. Employers and policymakers must recognise that hotter working environments are becoming more common. Practical protections, sensible workplace adjustments and clear guidance are essential.”
The organisation has consistently maintained that workplace support must evolve alongside changing economic and environmental pressures affecting UK workers.
That shift matters because more UK workers are now searching online for immediate answers to questions such as:
- “Can I refuse to work in extreme heat?”
- “What temperature is unsafe to work in the UK?”
- “Do employers have to provide water during hot weather?”
- “Can warehouse staff stop work during a heatwave?”
Search behaviour itself shows the issue is rapidly becoming mainstream.
The Workers Union has repeatedly argued that workplace legislation must keep pace with modern working realities, particularly as economic pressures continue to place strain on workers across the country.
The organisation’s earlier 2025 campaign now appears increasingly relevant as the government explores what stronger workplace heat protections may look like in practice.
In many ways, it reflects a wider principle that The Workers Union has consistently promoted:
Tomorrow’s workplace issues cannot wait until they become tomorrow’s crisis.
Or, as the organisation increasingly states across its campaigns:
“The Workers Union — tomorrow’s news today.”
