Which of the following groups is most at risk during high UV exposure?

Clients with a history of skin conditions are indeed most at risk during high UV exposure. This is because certain skin conditions can weaken the skin's natural defenses against UV radiation. For example, individuals with conditions such as eczema, psoriasis, or previous occurrences of skin cancers may have compromised skin that is more susceptible to damage. High UV exposure can exacerbate these existing conditions and lead to further complications, such as increased inflammation, heightened sensitivity, or additional health issues.

While clients using broad-spectrum sunscreen (which protects against both UVA and UVB rays) and clients who tan regularly may have some level of protection, they are not as vulnerable as those with existing skin health issues. Clients who avoid direct sunlight are taking proactive measures to limit UV exposure, thus reducing their risk. Therefore, the history of skin conditions presents a significant factor in increased vulnerability to high UV radiation, making this group the most at risk.