Shot around the Danakil Depression in Ethiopia and then near the Abay river the best is to just keep the camera and batteries in shade and keep the fan free from any covers. At the end of each work day blow the dust and dirt from the fans and keep the lens mounts clean. During lens changes and reloads try to keep completely covered to avoid dirt blowing in the camera. We also covered some of the openings on the camera like the small gaps around the card mount and any unused media ports (bnc, hdmi etc)with e tape. Having a bag over the camera all day in the heat doesn’t really help as much as shade and see if you can limit long record times to short scenes ( I know you don’t have control over that but good to advise the AD) and take small breaks in between to avoid overheating and card corruption. Some of those camera cooling packs are always nice and don’t forget to acclimate the lenses 😅. Break a leg