An extreme heat warning is in effect in Las Vegas, with forecasts predicting high temperatures later this week. Some residents have expressed concern about the early arrival of the heat, which they believe is catching them off guard. Dr. Marc J. Kahn from UNLV has warned of the potential dangers of leaving children in vehicles, older adults, young children, and people without consistent access to water are among the most vulnerable. He also emphasized the difference between heat exhaustion and heat stroke. Health officials have urged residents to stay hydrated, limit outdoor activities, and check on vulnerable neighbors as temperatures rise.