The construction sector calls for new work rules in cases of extreme heat

France – 15 July 2026: after the third heatwave of this summer, work on construction sites is once again at the centre of debate. Workers, construction companies and trade unions are calling for heat protection not to be organised only in exceptional situations. Earlier start times, longer recovery breaks, less physically demanding activities during the hottest hours and better contractual protection in the event of suspensions are being discussed.

Workers in building construction and infrastructure are particularly affected because they work outdoors, handle heavy loads and often have only limited means of protecting themselves from direct sunlight. According to state authorities, high temperatures considerably increase the risk of accidents. Concentration and reaction time may decrease, while dehydration, fatigue and heat-related circulatory problems become more likely.

Employers already have specific obligations. They must assess heat exposure in the risk assessment and adapt work to the situation. Measures include shifting working hours, avoiding the most demanding activities during the hottest hours, sufficiently long breaks, shaded rest areas and suitable work clothing. If protective measures are insufficient, work on the construction site must be suspended.

Drinking water must also be made available on construction sites. If running water is not available, at least three litres per worker per working day are required; a greater quantity may be necessary for particularly strenuous physical activities. The rules apply not only to employed construction workers but, under certain conditions, also to self-employed workers and contractors who personally work on site.

Since June 2025, provisions for protection against intense heat have been expressly enshrined in labour law. In the event of official heat warnings, companies must adopt gradual preventive measures and strengthen protective arrangements as exposure increases. On construction sites, the general health and safety plan and the site-specific safety plan must also take account of risks linked to intense heat.

The current debate therefore goes beyond compliance with minimum requirements. Workers’ representatives support the introduction of predictable summer rules so that crews do not react only when temperatures are already dangerous. Employers also point to work deadlines, costs and the practical difficulty of shifting activities in densely built-up urban areas or where noisy night work is involved.

During the summer season, state bodies responsible for occupational health and safety intensify inspections and advice in the sectors most exposed. In the event of work suspension during high levels of official alert, construction companies may, under certain conditions, make use of compensation and indemnity mechanisms. However, the concrete organisation of each construction site remains decisive: heat protection must be prepared before work begins and agreed with workers.