As Saudi Arabia swelters in temperatures up to 50 degrees Celsius, some are escaping to the "City of Fog" -- a mountainous oasis of cool where warm clothing is needed even in summer. The retreat, 2,800 metres (9,200 feet) above sea level in Saudi Arabia's rugged south, is in stark contrast to other parts of the vast, largely desert country where summer heat is an annual challenge. At Al-Namas, humid monsoon weather keeps temperatures below 30 Celsius (86 Fahrenheit), dropping as low as 15 Celsius (59 Fahrenheit) at night, as fog blocks out the sun over verdant hills. IMAGES AND SOUNDBITES