Thunderstorms and heavy rainfall are forecasted to occur starting from 22 September 2026, 09:00 WIB in parts of Riau especially in: BANGKINANG KOTA, BATANG CENAKU, BATANG GANGSAL, BATANG PERANAP, BENGKALIS, BUNGA RAYA, DUMAI BARAT, DUMAI SELATAN, KAMPAR, KAMPAR KIRI, KANDIS, MANDAH, MEMPURA, MERBAU, MINAS, PERANAP, PINGGIR, PINGGIR, PUSAKO, RANGSANG BARAT, RANGSANG PESISIR, RUPAT, SALO, SIAK, SIAK KECIL, SIMPANG KANAN, SUNGAI APIT, SUNGAI MANDAU, SUNGAI SEMBILAN, TASIK PUTRI PUYU, TEBING TINGGI TIMUR, XIII KOTO KAMPAR. These conditions may lead to reduced visibility, strong winds, and localized flooding. The public is strongly advised to remain vigilant during this period, limit outdoor activities, and take all necessary precautions to ensure safety. Conditions are expected to gradually improve by 22 September 2026, 12:00 WIB.