Japan Airlines Responds to 39°C Haneda Heat with Cooling Vests

Japan Airlines Is Handing Out Fan Vests to Survive 39°C Aprons, Aviation's Ground Crews Are Becoming a Heat Crisis

Japan Airlines has introduced fan-equipped cooling vests with improved battery systems for ground staff at Haneda Airport, where apron surface temperatures reached 39°C this summer. The airline is simultaneously distributing shaved ice in staff break rooms as Japan recorded its highest temperature of 2026, 40.6°C in Kuwana, amid a heat wave gripping the entire country.

The vests are a practical fix for an industrial problem that is quietly getting worse every summer across every major airport in the world.

What 39°C Actually Means on an Airport Apron

Airport aprons are not open parks. They are enclosed asphalt environments surrounded by jet engines, fuel-loaded aircraft, and heat-reflecting concrete, where the temperature a ground crew member experiences is consistently 5 to 10 degrees above the ambient air reading. A 39°C ambient reading at Haneda means apron workers are operating in conditions closer to 44 to 49°C for the hours they spend loading baggage, directing aircraft and conducting pre-departure checks. At those temperatures, heat exhaustion risk begins within 30 to 45 minutes of sustained physical activity without intervention.

Japan's broader heat crisis makes the aviation context more acute. The country has been logging record temperatures for consecutive summers, with extreme heat days, those above 35°C, occurring far more frequently than they did two decades ago. Tokyo now averages significantly more extreme heat days per summer than it did in the 1990s, and Haneda's urban heat island effect pushes apron temperatures consistently above what the official weather station readings capture.

What Airlines Are Actually Doing About It

JAL is not the only carrier deploying wearable cooling technology. ANA, JAL's domestic rival, introduced cooling vest programmes for ground handlers at multiple Japanese airports over the past two summers. Korean Air has distributed similar fan-equipped vests at Incheon and Gimpo following consecutive heatwaves. Singapore Airlines and Changi Airport Group have implemented rotating shade schedules, hydration stations at every stand, and mandatory rest period rules during peak afternoon hours when Changi's apron temperatures frequently exceed 38°C.

The interventions share a common thread, they are additive rather than structural. A vest keeps a worker cooler but does not change the environment. Shaved ice in break rooms addresses recovery between shifts but not the sustained exposure during them. The more fundamental adaptation, shifting high-intensity ground operations away from peak afternoon heat toward early morning and evening windows, is operationally difficult when airline schedules are built around passenger demand rather than temperature curves.

The Operational Reason Airlines Cannot Ignore This

Ground handling is one of the most physically demanding jobs in aviation and one of the most difficult to staff adequately. Heat-related illness among ramp workers does not just create a welfare problem, it creates an operational one. A ground crew member taken off shift with heat exhaustion is a baggage loader not loading bags, a pushback operator not pushing back aircraft, and a turnaround time that extends beyond the scheduled window. In a slot-constrained environment like Haneda, where on-time performance is measured in minutes, losing ground crew capacity to heat illness during peak summer afternoon operations directly affects departure punctuality for hundreds of flights.

JAL's cooling vest programme is therefore both a duty-of-care measure and an operational continuity decision. An airline that keeps its ground crews healthy through a 39°C summer day is an airline that keeps its afternoon bank of departures moving on schedule. The two objectives are inseparable.

Where This Goes Next

The wearable cooling technology JAL is deploying is improving rapidly. Battery life has been the historical constraint, early fan vest models required recharging every two to three hours, limiting their practical use across a full shift. The improved battery connector system JAL introduced this summer addresses that directly. Phase-change cooling materials embedded in workwear, fabrics that absorb body heat by changing state rather than relying on electricity, are being piloted by ground handling companies at Dubai International and Abu Dhabi airports, where summer temperatures make the Japanese experience look moderate.

IATA has not yet issued industry-wide guidelines on heat management for ground operations. Given the trajectory of summer temperatures at major aviation hubs across Asia, the Middle East and Southern Europe, the question is not whether those guidelines will come, it is whether they arrive before or after a preventable heat fatality on an airport apron forces the issue.