As the UK experiences one of its most intense June heatwaves on record, with temperatures forecast to approach 39°C in parts of England, businesses are feeling the effects far beyond uncomfortable offices and rising air conditioning costs. The current extreme heat is putting unprecedented pressure on water networks, energy systems, infrastructure and business operations across the country.
For many organisations, water is becoming one of the most overlooked business risks of the summer.
Demand Surges During UK Heatwave
Hot weather drives a dramatic increase in water consumption. People drink more, businesses use more water for cooling, and sectors such as hospitality, leisure, manufacturing and construction often see higher operational demand.
The impact is already being felt in the South East. South East Water, which serves parts of Hampshire, Surrey, Berkshire, Kent and Sussex, has urged customers to use water only for essential purposes due to exceptionally high demand caused by the ongoing heatwave.
While many businesses assume water is always available when they need it, periods of extreme demand can create pressure issues, supply constraints and operational challenges.
The Cost Impact Starts Immediately
The most obvious effect is increased consumption.
Businesses may see:
- Higher water bills.
- Increased wastewater charges.
- Greater energy costs associated with cooling systems.
- Additional maintenance requirements for cooling equipment.
The current heatwave is also pushing up electricity demand nationally, with Great Britain’s grid operator issuing a rare summer notice requesting additional generation capacity to meet demand. This means businesses are often facing higher water and energy consumption simultaneously.
For facilities managers and finance teams, utility costs can rise significantly during prolonged periods of extreme heat.
Operational Risks Are Growing
Many organisations still view water resilience as a concern for drought years rather than heatwaves. However, recent events suggest that mindset needs to change.
Earlier this year, thousands of customers in South East England experienced low pressure and water outages during periods of exceptionally hot weather and record demand. Some businesses were forced to close or alter operations because they simply could not access the water they needed.
For businesses that rely on water for:
- Production processes.
- Cleaning and sanitation.
- Cooling systems.
- Catering and hospitality services.
- Customer facilities.
Even a short interruption can have serious consequences.
Water Restrictions Are No Longer Theoretical
The current heatwave has already prompted warnings about non-essential water use, and some areas have introduced restrictions as demand continues to rise. Water companies are increasingly asking customers to reduce discretionary consumption to protect supplies and maintain network stability.
While restrictions often focus on domestic activities, businesses should not assume they are unaffected.
Organisations with landscaping, irrigation, vehicle washing, leisure facilities or other water-intensive activities should review local guidance and consider contingency plans if restrictions become more widespread.
Employee Wellbeing Depends On Water Too
Heat resilience and water resilience are closely linked.
Businesses must ensure:
- Adequate drinking water supplies.
- Effective cooling measures.
- Appropriate welfare arrangements for outdoor workers.
- Flexible working practices where necessary.
The UK Health Security Agency has warned that the current conditions pose health risks beyond traditionally vulnerable groups, highlighting the need for employers to take heat-related risks seriously.
A Glimpse Of The Future
Perhaps the most important takeaway from this week’s weather is that it is unlikely to be an isolated event.
Experts have repeatedly warned that hotter summers, more frequent heatwaves and greater pressure on water resources are becoming part of the UK’s long-term climate reality. Recent heatwaves have already exposed vulnerabilities in water infrastructure and demonstrated how quickly demand can exceed expectations.
Businesses that understand their water dependency today will be better prepared for future disruptions.
What Businesses Should Be Doing To Prepare For A Heatwave
The current heatwave is a useful reminder to review water resilience before a supply issue becomes a business issue.
Key questions include:
- Do we know where our highest water consumption occurs?
- Could our operations continue if supply was reduced?
- Have we identified opportunities to improve efficiency?
- Do we have a plan if restrictions or outages occur?
- Are we monitoring utility usage closely during peak demand periods?
Get In Touch
This week’s heatwave isn’t just a weather event. It’s a stress test for the UK’s infrastructure and a reminder that water is becoming an increasingly important business resource. For organisations across the country, the question is no longer whether extreme heat can affect operations—it’s whether they’re prepared when it does.
Businesses that treat water resilience as a strategic issue today will be in a far stronger position when the next heatwave arrives. If you want to be prepared, get in touch with our expert team today.