Three anonymous National Express drivers in the West Midlands, each with more than 20 years' service, told the Guardian that heatwave temperatures in their cabs reached 40C and described inadequate cooling, soaked clothing, exhaustion and fear that concentration would suffer while driving. [1]

One driver said passengers had passed out, but that is testimony, not an independently reconciled health count, and the article supplies no calibrated temperature series, number of affected buses, route denominator, medical ledger or crash record connecting heat to a collision.

National Express said all its new electric buses have air conditioning, drivers received extra breaks and free water, and retrofitting older vehicles might need reconsideration if recent heat becomes normal [1], but those measures are an employer response, not evidence that every worker could take a break without losing pay or delaying service.

The fleet distinction is the useful one because three long-serving drivers can identify a serious hazard without proving that every cab reached 40C, while a company can point to cooled new buses without showing how many older vehicles remain, whether their cabs were measured or when any retrofit would happen.

The required X search timed out without a verified status, so no broader worker or passenger verdict can be inferred; the July 20 record establishes attributed warnings and a company answer, while fleet-scale temperatures, incidents, protections and remedies remain to be measured.

-- NORA WHITFIELD, Chicago