The UK is experiencing hotter summers, with the Met Office reporting that the five warmest UK summers on record have all occurred since 2003. Allianz Research also highlights extreme heat as a growing economic risk, particularly once temperatures move above 30°C. 

For businesses, heat is not just a comfort and concentration issue. It can affect equipment, storage, fire risks, travel and continuity. Small weaknesses, such as poor ventilation, missed maintenance or poorly controlled outdoor storage, can quickly become bigger problems. 

Start by asking what changes in summer. 

*including vulnerabilities due to pregnancy, medical conditions, medication, disability or long periods wearing PPE.

Hot weather can increase fatigue, reduce concentration and raise the chance of accidents, especially for people working outdoors, in vehicles, kitchens, warehouses, production areas or poorly ventilated spaces. 

Provide easy access to drinking water, shade or cooler rest areas, and consider moving physically demanding tasks to cooler parts of the day. For outdoor workers, think about sunburn, sunscreen, suitable clothing and safe sun exposure. PPE remains important, but working patterns may need adjusting where it increases heat stress.

Outdoor areas are often used more in summer. Bins, packaging, pallets, temporary seating, open doors and event equipment can all increase fire, security and housekeeping risks. 

Keep combustible materials away from buildings, remove waste regularly, review smoking areas and maintain fire detection and fire-fighting equipment. Cut back dry grass, weeds and overgrown vegetation to reduce the risk of accidental ignition and fire spread. 

Check how flammable liquids, aerosols, fuels and other temperature-sensitive materials are stored. Higher temperatures can increase fire risk as substances move closer to their flashpoint, so cooler, shaded or better ventilated storage may be needed. 

Warmer summers can also bring sudden storms and heavy rainfall. When severe weather is forecast, clear drains and gutters, secure outdoor furniture and signage, check temporary structures and move key stock or equipment away from areas where water could enter. 

Machinery and plant can come under extra pressure in hot weather. Regular monitoring and maintenance can help prevent overheating, breakdown or damage to stock, equipment or the wider site. Where possible, run heat-sensitive processes during cooler periods or support them with ventilation, cooling or air conditioning.