bright red background with sun and city skyline silhouette, bold white letters warning of heat wave

mobile wallpaper android iphone screen display vertical heat wave red alert urgent city skyline vivid background glowing sun white letters silhouette urban warning emergency danger high temperature extreme discomfort health risk sunburn dehydration exhaustion heatstroke scorching unbearable blistering searing sweltering sizzling oppressive scalding burning hot climate intense recordbreaking index advisory heatrelated illnesses relief air conditioning stay indoors protect