Buy a lightweight, breathable camera strap that does not trap heat against the body of the camera

https://daltonsrpe450.trexgame.net/electronic-camera-thermal-management-101-strategies-for-keeping-your-devices-cool

Invest in a light-weight, breathable camera strap that doesn't trap heat versus the body of the camera. Appropriate air flow around the device assists mitigate overheating risks.