California health officials have issued a warning about potential exposure to Valley fever at the Lightning in a Bottle music festival held at Buena Vista Lake from May 22-27. Out of over 20,000 attendees, five have been diagnosed with the fungal infection, with three requiring hospitalization. Valley fever is caused by inhaling spores of the Coccidioides fungus, which is common in California's soil and can lead to respiratory symptoms such as fever, cough, and fatigue. While the disease is not contagious, it can be severe and even fatal in rare cases. Health authorities are urging anyone who attended the festival and is experiencing symptoms to seek medical attention. Festival organizers are cooperating with health officials to implement future preventative measures.