The detected lightning activity poses risks to outdoor activities, particularly in open areas, near water bodies, or on elevated terrain. Lightning strikes can cause severe injuries or fatalities, and the risk is heightened during thunderstorms. Residents and visitors in Phoenix should be cautious and prepared to seek shelter immediately if thunder is heard or lightning is observed. The 30-30 rule is recommended: if thunder is heard within 30 seconds of a lightning flash, seek shelter and remain indoors for at least 30 minutes after the last thunderclap.