Heat Stress Study Pins 38.5°C Core Temperature as Red Line – But Protective Gear Falls Short in Tests
10.06.2026 - 01:13:21 | boerse-global.de
A fresh analysis from the Austrian Chamber of Labour (Arbeiterkammer Wien) and the Medical University of Vienna, presented on Monday, has identified a precise medical threshold for workplace heat safety: a core body temperature of 38.5 degrees Celsius. At that point, researchers say, work must stop immediately.
The findings rest on more than 17,000 individual calculations. Mental performance already drops noticeably at 27°C, the study shows. By the time the thermometer reaches 30°C, the risk of workplace accidents climbs by 7%.
These numbers underpin a push by labour representatives for legally binding exposure limits. Ines Stilling of the Arbeiterkammer Wien called for mandatory measurement tools and stricter on-site controls, and insisted that protection rules should extend indoors — into hospitals, schools and factory halls. A right to “Hitzefrei” (a work stoppage due to acute heat danger) is also on the agenda.
As the push for mandatory heat measurement tools and stricter on-site controls grows, keeping a proper record of workplace risks is more important than ever. A free Risk Assessment Toolkit gives you 41 ready-to-use templates and checklists — covering heat stress, lone working, fire safety and more — so you can document hazards confidently and stay compliant. Download the free Risk Assessment Toolkit
Austria already has a heat protection ordinance in effect since January 2026, but it mainly covers outdoor work. That gap matters more each year: the Austrian Trade Union Federation (ÖGB) notes that the number of days above 30°C has tripled. A survey by the FORBA institute found that six out of ten works council chairs reported increasing heat strain last year.
Long-term health consequences are also moving into focus. The study recorded 51 cases of white skin cancer recognised as occupational diseases linked to UV exposure. Chronic kidney damage and elevated cancer risks are additional concerns flagged by researchers.
On the occasion of Heat Action Day on June 11, the German Social Accident Insurance (DGUV) stepped up awareness efforts about heat exhaustion symptoms — clammy, pale skin, rapid pulse, muscle cramps and nausea. Without treatment, a heat stroke can cause lasting organ or brain damage. Immediate recommended steps include moving to a cool environment, applying wet cloths and drinking electrolyte-rich fluids.
Yet even basic equipment raises doubts. A test by the Austrian Association for Consumer Information (VKI) examined twelve children’s UV-protection shirts. Only half of them delivered the stated SPF 50+ factor. Eight products contained bisphenols, and three models received a negative rating as a result. The consumer group stressed that neither brand nor price reliably predicts protection quality.
Workplace health risks extend well beyond heat — from UV exposure to hazardous substances and manual handling. The free Health & Safety Toolkit gives you ready-to-use risk assessments, checklists and toolbox talks covering COSHH, PPE, fire safety and more, helping you meet your legal duties under UK law. Over 37,000 British companies already use it. Download the free Health & Safety Toolkit
Across the border, Switzerland is taking its own step forward. The Swiss Federal Council approved a message on June 5 to ratify the International Labour Organization’s conventions that enshrine a safe and healthy working environment as a fundamental principle.
In Germany, more than 150 organisations — including the Federal Medical Chamber — are demanding that heat protection be anchored in crisis preparedness and disaster response planning. The push follows extreme heat episodes across Europe; by late May, parts of southern France and northern Italy had already recorded temperatures above 40°C. A specialist conference on the subject is scheduled for Wednesday in Berlin.
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