10 Aug 2022 | 05:54 AM UTC
Japan: Heatwave forecast across western and eastern regions through at least Aug. 18 /update 1
Heatwave forecast across western and eastern Japan through Aug. 18. Transport, utility disruptions possible. Health concerns likely.
Event
Forecast models indicate that a heatwave will persist across portions of western and eastern Japan through at least Aug. 18. As of early Aug. 10, the Japan Meteorological Agency (JMA) has issued heat stroke alerts across most of the affected area. Authorities may update, extend, or rescind advisories as weather conditions change over the coming days.
Forecast models indicate maximum temperatures of 38 C (100 F) across Kumagaya City in Saitama Prefecture and 37 C (99 F) across Hita City in Oita Prefecture, Yonago City in Tottori Prefecture, Kyoto City in Kyoto Prefecture, and Maebashi City in Gunma Prefecture Aug. 10. Temperatures of 36 C (97 F) are likely in Fukuoka, Fukushima, Nara, Okayama, central Tokyo, and Toyama prefectures while temperatures of 35 C (95 F) are forecast over parts of Aichi, Ehime, Kagoshima, Nagano, Nagoya, and Osaka prefectures Aug. 10. High temperatures are likely to persist through at least Aug. 18.
Authorities have confirmed that 7,218 people nationwide were hospitalized due to heat stroke Aug. 1-7, of which there were five fatalities.
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.
