Saudi Arabia’s Civil Defense crews have raised their preparedness levels ahead of expected heavy rains and thunderstorms as some schools suspended classes in some areas along the kingdom’s Red Sea coastline. The schools are to be closed on Monday and Tuesday. The U.S. Embassy in Riyadh also warned American citizens that heavy rainfall, high winds and rough seas are expected to last until Wednesday. The statement said dust storms could make for dangerous driving conditions. Areas most likely to be hit by significant rainfall include the western regions of Mecca and Medina and the northern regions of Tabuk and al-Jawf.