As a child traveling around northern Spain and rural southern France we got caught out and had to stop and wait for a service station to reopen so we could buy petrol. All part of the experience.

I've lived in a few places that would get consecutive 40C+ days. Perfectly fine unless the wind is a strong northerly blowing from the interior. The 37C in Brisbane this year was much less bearable due to the higher humidity: 75% rather than 45%.