RIYADH — National Center for Meteorology has issued on Wednesday red alerts for several regions across the Kingdom due to dense fog that has reduced visibility to less than one kilometer, posing serious risks to motorists and commuters. In the Eastern Province, a red alert for thick fog is in effect for Al Jubail, Al Khobar, Dammam, Al Qatif, and Ras Tanura.The fog was forecast to begin at 11 p.m. on Tuesday and continue until noon on Wednesday. In Al Adeed, fog was expected to start at 1 a.m. on Wednesday and persist until 11 a.m. the same day. Later, the alert level in parts of the Eastern Province was downgraded to a yellow warning for rainfall, indicating light to moderate rain.Hafr Al Batin was forecast to experience rainfall from 11:30 a.m. to 5 p.m. on Wednesday. The Makkah region was also placed under a red alert for dense fog, particularly in Taif, with conditions expected from 11 p.m. on Tuesday until 10 a.m. on Wednesday. The alert was later upgraded to an orange warning for weather instability, including moderate to heavy rainfall, strong winds, and the possibility of hail and flash floods. Areas expected to be affected include Al Kamel, Rihat, and Madraka from 1 p.m. to 8 p.m. on Wednesday.Similarly, parts of the Riyadh region, including Az Zulfi, Al Ghat, Al Majma’ah, and Shaqra, were forecast to experience orange-level rainfall from 9 a.m. to 8 p.m. on Wednesday. In the Northern Border region, Rafha was placed under an orange alert for dust storms, with stirred-up dust expected to significantly reduce visibility from 10 a.m. to 7 p.m. on Wednesday. The NCM urged residents and travelers to exercise caution, follow safety guidelines, and stay updated through official weather advisories.