By Jordan Root – AccuWeather
Heat will continue to plague the southwestern United States early this week after a brutal weekend that led to at least four deaths.
Four hikers died in separate incidents in Arizona where temperatures soared to record levels in some areas. One man is still unaccounted for in Ventana Canyon in Pima County, near Tucson.
Pima County police issued a statement encouraging people to limit physical activities during “extreme temperatures.”
The heat also led to some travel delays. Minutes before landing in Phoenix on Sunday, a Mesa Airlines flight was forced to turn back to its departure point in Houston due to the heat.