What should divers do to prepare for thermal-related risks like hyperthermia?

To prepare for thermal-related risks such as hyperthermia, divers should focus on hydrating adequately and managing their exposure time. Staying well-hydrated is crucial because dehydration can exacerbate the effects of heat on the body, leading to an increased risk of hyperthermia. Proper hydration supports the body's ability to regulate temperature and helps maintain overall physiological function during dives.

Managing exposure time is equally important, as prolonged exposure to high temperatures can elevate the risk of overheating. Divers should monitor their dive duration and take appropriate breaks if they start to feel overheated. Together, these practices ensure that divers maintain a safe internal environment even when external conditions present challenges.

The other choices would not effectively mitigate the risk of hyperthermia. Increasing the weight belt does not address temperature management; restricting depth may not have any direct impact on thermal stress; and avoiding dive buddies can compromise safety and support, which is essential when dealing with thermal stress or emergencies.