Japan Records Multiple 40C Days as Heatstroke Kills at Least 14
Japan is experiencing 'cruelly hot days' with temperatures above 40 degrees Celsius as at least 14 people have died from heat-related causes in the past week, while flash flooding is occurring in parts of Arizona and West Virginia and a Red Flag Warning has been issued for wildfire risk in Washington state.
Japan Issues 'Cruelly Hot Day' Warnings as Heat Claims Lives
Japanese cities logged temperatures above 40C on Tuesday, prompting the new 'kokushobi' or 'cruelly hot day' warning term from the Japan Meteorological Agency. [1] Three central cities logged scorching temperatures on Tuesday above the new threshold, called kokushobi, which translates to “cruelly hot day”, according to the Japan Meteorological Agency. [1] The new term was designed to draw greater public attention to heat-related warnings, although it does not trigger any official measures nationwide. [1] Heatstroke alerts were issued in 41 of Japan's 47 prefectures, with emergency officials describing the heat as a disaster and urging the elderly to stay cool. [1] The JMA has issued heatstroke alerts in 41 out of Japan’s 47 prefectures, urging the public – especially the country’s many elderly – to take steps to stay cool. [1] Large areas, including the central hub of Nagoya and communities near Tokyo in the east, were enduring temperatures approaching or above 40 degrees on Wednesday. [1] Emergency officials described the soaring temperatures on Wednesday as “a disaster”. [1] Japanese agency warns of ‘cruelly hot days’ amid 40 degrees and above heat, with at least 14 people having died from heat-related causes in the past week. [1]
The Japan Meteorological Agency introduced the kokushobi designation this year specifically to highlight days when temperatures exceed 40 degrees Celsius. [1] This designation applies when cities record such extremes, as occurred on Tuesday in three central locations. [1] Officials noted that the term aims to increase awareness without imposing additional nationwide restrictions. [1] Heatstroke alerts covered 41 prefectures, leaving only six without such warnings during the current period. [1] Emergency responders emphasized the need for vulnerable groups, particularly elderly residents, to remain in cooled environments. [1] The agency reported that temperatures in regions near Nagoya and east of Tokyo approached or surpassed the 40-degree mark on Wednesday. [1] At least 14 deaths linked to the heat occurred over the preceding seven days. [1]
Flash Flooding Strikes Northern and Central Arizona
Flash flooding is already occurring along the Moenkopi Wash in Coconino County, Arizona, after a river gauge reported an 11-foot rise, with the warning extended until 9 AM MST. [2] At 405 AM MST, a river gauge on the Moenkopi Wash near Moenkopi has reported a rise of 11 feet since 1230 AM MST, reaching major flood stage. [2] This is due to heavy rainfall upstream earlier Tuesday. [2] The National Weather Service in Flagstaff has extended the Flash Flood Warning for the Moenkopi Wash in Coconino County in north central Arizona until 900 AM MST. [2] Flash flooding is already occurring along the wash. [2] Hazard conditions include life threatening flash flooding along the affected waterway. [2]
A separate Flash Flood Warning is in effect for the Agua Fria River in Yavapai County, Arizona, following a 4.5-foot rapid rise, with flooding possibly reaching Black Canyon City after 7 AM. [3] At 355 AM MST, a river gauge on the Agua Fria River just east of Cordes Lakes reported a rapid rise of 4.5 feet from heavy rain that occurred upstream Tuesday evening. [3] Flash flooding is already occurring and will continue southward, possibly reaching Black Canyon City after 7 AM. [3] The National Weather Service in Flagstaff has issued a Flash Flood Warning for the Agua Fria River in Yavapai County in west central Arizona until 900 AM MST. [3] The warning covers ongoing flash flooding that will continue to move downstream. [3] Life threatening flash flooding remains the primary hazard in the warned area. [3]
Excessive Rainfall Causes Flooding in West Virginia
Flooding from excessive rainfall and thunderstorms is ongoing or imminent in southwestern Ritchie County, West Virginia, until 9:45 AM EDT. [5] At 647 AM EDT, Doppler radar indicated heavy rain due to thunderstorms. [5] Flooding is ongoing or expected to begin shortly in the warned area. [5] The National Weather Service issued a Flood Warning for southwestern Ritchie County in northwestern West Virginia until 945 AM EDT. [5] Flooding caused by excessive rainfall affects rivers, creeks, streams, and other low-lying and flood-prone locations that are imminent or occurring. [5] Some locations that will experience flooding include areas within the warned county. [5]
Red Flag Warning Issued for Washington Wildfire Risk
A Red Flag Warning for lightning and gusty winds is in effect until 2 PM PDT Thursday for the Black Hills, Southwest Interior Lowlands and parts of the Central Cascades in Washington state. [4] The National Weather Service in Seattle has issued a Red Flag Warning for lightning and gusty outflow winds which is in effect from 4 PM PDT this afternoon to 2 PM PDT Thursday. [4] The Fire Weather Watch is no longer in effect. [4] Affected areas include Fire Weather Zone 655 Black Hills and Southwest Interior Lowlands and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. [4] Winds are west 5 to 10 mph except possible gusts 25 to 30 mph with thunderstorms. [4] The warning addresses elevated wildfire risk from these conditions. [4]
Broader Global Severe Weather Context
The Japan Meteorological Agency reported kokushobi conditions and heatstroke alerts across 41 prefectures alongside the deaths of at least 14 people in the past week. [1] The National Weather Service extended a Flash Flood Warning for the Moenkopi Wash in Coconino County until 9 AM MST after an 11-foot rise. [2] A separate Flash Flood Warning covers the Agua Fria River in Yavapai County until 9 AM MST following a 4.5-foot rise. [3] A Flood Warning remains active for southwestern Ritchie County in West Virginia until 9:45 AM EDT due to heavy thunderstorms. [5] The National Weather Service in Seattle maintains a Red Flag Warning through 2 PM PDT Thursday for zones including the Black Hills and West Slopes of the Central Cascades. [4] These alerts address simultaneous heat, flood, and fire weather conditions reported from the respective agencies.
What to watch next: Continued monitoring of the extended Flash Flood Warning in Coconino County until 9 AM MST, the Flash Flood Warning in Yavapai County until 9 AM MST, the Flood Warning in Ritchie County until 9:45 AM EDT, and the Red Flag Warning in Washington until 2 PM PDT Thursday.
