Heatwave Warning for Northern and Central Vietnam, Flood Risk on Northern Rivers

The National Center for Hydro-Meteorological Forecasting announced on July 19 that the northern plains and Thanh Hoa province will experience intense heat, with maximum temperatures expected to reach 35-36 degrees Celsius, and over 36 degrees Celsius in some locations. The lowest relative humidity is predicted to be between 55-60%. On July 18, the northeastern region, areas from Thanh Hoa to Da Nang, and the eastern parts of provinces from Quang Ngai to Dak Lak experienced hot weather, with some locations exceeding 38 degrees Celsius. For instance, the Tam Ky station in Da Nang recorded 39.7 degrees Celsius, Quang Ngai 38.7 degrees Celsius, and Hoai Nhon (Gia Lai) 38.7 degrees Celsius. The lowest relative humidity ranged from 45-55%. From July 19-20, the region from Nghe An to Da Nang and the eastern parts of provinces from Quang Ngai to Dak Lak will continue to face hot weather, with maximum temperatures ranging from 35-37 degrees Celsius, and over 38 degrees Celsius in some places. The lowest relative humidity is expected to be between 50-55%. The heatwave in the central region is likely to persist until around July 23, with temperatures gradually subsiding from July 24. The combination of intense heat and low humidity increases the risk of fires and explosions in residential areas due to heightened electricity consumption. Furthermore, prolonged exposure to high temperatures can lead to dehydration. Currently, water levels on the main rivers in the northern region are fluctuating slowly and remain below alert level 1. However, from July 19-20, a flood event is anticipated on rivers in the northern region, with flood levels expected to rise by 2-4 meters. During this flood event, the peak flood on smaller rivers could reach alert level 1 to alert level 2, and some may exceed alert level 2. The upper reaches of the Thao River, Lo River, and the Thai Binh River system will fluctuate around alert level 1. There is a high risk of flash floods and landslides in the mountainous and midland provinces, as well as flooding in low-lying areas along rivers and urban areas in the northern region. River floods can inundate low-lying areas, affecting activities such as water transportation, aquaculture, agricultural production, public life, and socio-economic activities.