Vietnam: High temperatures forecast across central and southern regions through at least Aug. 19 /update 1

Event

A heatwave is likely to persist across parts of central and southern Vietnam through at least Aug. 19. As of early Aug. 15, the Vietnam National Center for Hydro-Meteorological Forecasting (NCHMF) has warned of temperatures of 35-37 C (95-99 F), with minimum temperatures of 26-28 C (79-82 F) and relative humidities of 50-60 percent across Quang Tri, Khanh Hoa, and Ninh Thuan provinces Aug. 15-16, and temperatures of 36-38 C (97-100 F), with minimum temperatures of 26-29 C (79-84 F) and relative humidities of 45-55 percent from Thua Thien Hue to Phu Yen provinces over the same period. Meteorologists forecast the high temperatures are likely to persist over the central region through at least Aug. 19. Officials have issued a level 1 warning of natural disaster risk due to the heat forecast.

Authorities have warned that fires are possible due to the increased demand for electricity and the combination of high temperatures, low humidity, and strong winds. Thunderstorms with strong winds, lightning, and hail are possible in the mountainous areas of central and northern Vietnam when high temperatures occur. Officials could update or expand the alerts over the coming days as conditions change.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also threaten vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events. In addition to significantly impacting athletes and those who work outdoors, high temperatures can cause problems for people using mass transit. The lack of air conditioning and cramped vehicles during rush hour may lead to some passengers' hospitalization.

Transport and Utilities
Very high temperatures may damage road surfaces, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur, as very high temperatures put more stress on vehicles, making tire blowouts more common. Major flight disruptions are unlikely at regional airports, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.

Advice

Monitor local media for weather updates and related advisories. During heatwaves, remain indoors in air conditioning when possible. If outdoor activities are necessary, frequently rest in shaded areas; avoid activity during the hottest times of the day. Stay well hydrated by drinking plenty of fluids. Avoid alcoholic beverages, which are dehydrating; drink bottled or boiled water. Wear loose-fitting, light-colored clothing. Cotton fabrics are more cooling than synthetics. Promptly seek medical attention if signs of heat exhaustion or heat stroke develop. Charge battery-powered devices in the case of prolonged electricity outages.

Resources

Vietnam National Centre for Hydro-Meteorological Forecasting (NCHMF)