30 Aug 2023 | 12:28 AM UTC
Japan: High temperatures are forecast to persist across most of the country through at least Sept. 3
High temperatures forecast across most of Japan through at least Sept. 3. Transport, utility disruptions possible. Health concerns likely.
Event
Forecast models indicate that high temperatures will persist across much of Japan through at least Sept. 3. The Japan Meteorological Agency (JMA) has issued a bulletin warning that a high-pressure system will persist over northern and eastern Japan through Sept. 2 and over western Japan and Okinawa Prefecture through Sept. 3. Temperatures of over 35 C (95 F) are likely in northern, eastern, and western Japan, with slightly lower temperatures of 33 C (91 F) forecast in Okinawa Prefecture. The JMA has issued heat stroke alerts across northern Chubu, most of Chugoku, most of Kansai, southern Kanto, most of Kyushu, most of Okinawa, northeastern Shikoku, and western and northern Tohoku regions Aug. 30. Authorities may update, extend, or rescind advisories as weather conditions change over the coming days. One person in Nishio City, Aichi Prefecture, died due to heatstroke the afternoon of Aug. 28.
Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also pose a threat to 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.
Transport and Utilities
Very high temperatures could warp rail tracks and force passenger and freight trains to operate at reduced speeds. Damage to road surfaces is also possible, and overheated vehicles could 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 and make tire blowouts more common. Major flight disruptions are unlikely at regional airports; however, 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 caffeinated and alcoholic beverages, which are dehydrating. 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 case prolonged electricity outages occur.
