Science2015-2016Australiahigh confidence

In a second study, firefighters were able to manage heat stress at temperatures reaching 45°C by reducing work output while their core temperatures stayed at 38.5°C.

Notes on verification

Directly corroborated by ABC News interview quote and underlying peer-reviewed Frontiers in Physiology study; minor rounding discrepancy in core temperature (38.65C vs 38.5C) is negligible. [tier=silver indep_score=1.0 clusters=2 claim_tier=notable | framework convergence=single on Deakin University/Bushfire CRC experimental firefighter heat-stress study reported via Aisbett's own interview statements (upstreams: Larsen, Snow, Williams-Bell & Aisbett (2015) Frontiers in Physiology study 'Simulated Firefighting Task Performance and Physiology Under Very Hot Conditions') — publishers independent, evidence may not be | kind=attributed eligibility=high]

Sources