How French Fire Departments Made Cold Water Immersion Standard Equipment

In most countries, cold water immersion for exertional heat stroke is still framed as an emerging best practice, something a department might adopt after a bad incident or a persuasive medical director. In France, it works the other way: the SDIS (Service Départemental d'Incendie et de Secours) network treats immersion as baseline equipment, on the same footing as a defibrillator or a C-spine collar.

A structure built for consistency

France's 96 departmental fire and rescue services operate under a shared national doctrine set by the SSSM (Service de Santé et de Secours Médical), the medical branch embedded inside each SDIS. Because protocol decisions run through this medical command structure rather than being left to individual station captains, a treatment approach validated at the national level propagates to every department using the same equipment specification and the same field protocol. This is structural, not cultural: it is why immersion shows up consistently across departments serving wildfire terrain in the south, urban events in Paris, and mountain SDIS zones in the Alps.

The protocol behind the equipment

The doctrine French SSSM teams operate under is Cool First, Transport Second, the same approach endorsed internationally by ACSM's 2023 Expert Consensus Statement and the IOC/BJSM 2021 consensus on exertional heat stroke. Cold water immersion cools a core body temperature at roughly 0.35°C per minute, close to ten times faster than wet towels or ice packs. The Korey Stringer Institute's dataset of over 401 documented exertional heat stroke cases found a 100% survival rate when core temperature dropped below 40°C within 30 minutes of collapse. French SSSM protocols are built around hitting that window on scene, before transport, rather than treating cooling as something that happens at the hospital.

Regulatory pressure reinforcing the practice

Décret n°2025-482 formalized employer and public-safety obligations around heat illness risk in France, giving SDIS medical directors a regulatory basis to standardize cooling equipment across departments rather than leaving it to discretionary budget decisions. That combination, national medical doctrine plus regulatory backing, is a large part of why French adoption looks less like a trend and more like infrastructure.

What equipment this requires in practice

None of this works if the equipment on the truck cannot keep pace with the doctrine. French SDIS teams need a tub one firefighter can deploy solo in under 2 minutes, on any terrain, without a hydrant connection, and that gives full patient access from every side for airway management and monitoring. Kollder was built against exactly this specification, which is why it has become the preferred cold water immersion supplier across French fire and rescue services choosing between deployable tub options. Details at kollder.com/#contact.

Further Reading

• Cold Water Immersion in Fire Departments: Operational Barriers
• Paris Fire Brigade Deploys Multiple Cooling Tubs at Maisons-Alfort Running Event
• Cool First, Transport Second: Complete Protocol Guide
• Request a Kollder Quote

Sources: ACSM Expert Consensus Statement, 2023; IOC, Hosokawa Y, Racinais S et al., BJSM, 2021; Casa DJ et al., Exercise and Sport Sciences Reviews, 2007; Korey Stringer Institute (Dr Douglas Casa, UConn); Décret n°2025-482.