JEDDAH: The General Directorate of Saudi Civil Defense has urged residents to take precautionary measures against thunderstorms and dust storms that are likely to affect some regions between Friday and Monday.  The organization, acting on information from the National Center of Meteorology, said the Makkah region will be affected by moderate to heavy rains that may lead to torrential flows. The areas of Taif, Maysan, Adham, Al-Khurmah, Al-Ardiyat, Turbah, Rania, Al-Muwayh, Qia, Khulais, Al-Kamil, Al-Jumum, Bahra, Al-Lith, and Al-Qunfudhah are expected to be hit. The Riyadh region is also expected to suffer, including the capital, Al-Kharj, Wadi Al-Dawasir, As-Sulayyil, Afif, Al-Duwadmi, Shaqra, Al-Zulfi, Al-Majma’ah, Al-Quwa’iyah, Al-Ghat, Hotat Bani Tamim, Al-Aflaj, Thadiq, Ramah, Al-Muzahimiyah, Al-Diriyah, Dhurma, Huraymila and Al-Dalam. Authorities stressed the need to stay away from areas where torrents gather, and not to swim in dangerous places.  Residents have been advised to adhere to instructions announced through the media.  The regions of Asir, Al-Baha, Jazan, Najran, Madinah, Hail, Tabuk, Al-Jawf, the northern borders, Al-Qasim and the eastern borders are also expected to be affected. Moderate rains and winds resulting in dust storms are expected in the Makkah region, including Jeddah and Rabigh. The Civil Defense has stressed the need to stay away from areas where torrents gather, and not to swim in dangerous places. Residents have been advised to adhere to instructions announced through the media.