2020 Kyushu floods

Record-breaking heavy rain hit the prefectures of Kumamoto and Kagoshima in the southern Japanese island of Kyushu on 4 July 2020 in the middle of the East Asian rainy season. The event is officially referred to as Reiwa ni-nen shichi-gatsu gōu (令和２年７月豪雨, "Heavy rain of July, Reiwa 2") by the Japan Meteorological Agency.[1] As a result of flooding and landslides, 77 people were confirmed dead (includes 1 death due to cardiopulmonary arrest) and approximately seven are missing.[2] Fourteen of the victims were residents of an old age home in Kuma, Kumamoto that was flooded. Approximately 15,335 buildings have been destroyed, damaged or flooded.[3]

2020 Kyushu floods
令和２年７月豪雨
(Heavy rain in July, Reiwa 2)
Changing of rain-fall distribution in Kumamoto Prefecture (time is shown on the bottom left)
Date4 July 2020 (2020-07-04) – ongoing
LocationKumamoto and Kagoshima prefectures in the southern Japanese island of Kyushu
Deaths77 confirmed
Property damage15,335 houses destroyed, damaged or flooded; 11 bridges destroyed

Background

Typhoons, storms, and heavy flooding have hit Japan hard in the years prior to 2020. Aside from Hokkaido, the entire country is subject to the East Asian rainy season, known as Tsuyu (梅雨), during the early part of summer. The mountainous terrain of Japan places it at risk for flooding and landslides. These climate events have killed hundreds of people, and expert analysis has stated global warming is a contributing cause.[4]

The Kuma River basin had previously flooded in 1965. One of three major rapids in Japan, the Kuma is a 115-kilometer-long (71 mi) class A river. Its course begins in the mountain range in Kyushu, and runs through Hitoyoshi, Kumamoto; Kuma, Kumamoto; and Yatsushiro, Kumamoto before it discharges into the Yatsushiro Sea.[5]

Events
Kamase Bridge (left) and Kumagawa Railway Bridge No.1 (right) were washed away.

On 4 July 2020, heavy rain caused flooding in the southern Japanese island of Kyushu. At 5 AM, local time (UTC+9) the Japan Meteorological Agency raised its heavy rain warning to its highest level of 3 in many parts of the prefectures, the first time it has ever done so for these areas.[6] The Japan Meteorological Agency stated the amount of rain was record-breaking for the region and was never seen before.[7] The rate of rainfall exceeded 100 millimeters (3.9 in) per hour.[8]

As of 9 July 2020, 60 people are confirmed dead and approximately a dozen are reported missing.[9] According to Kyodo News, 1.3 million people were ordered to evacuate their homes and there were 12 different landslide events.[10]

Fourteen of the dead were residents in a flooded old age home in Kuma, Kumamoto.[6][7] Kumamoto governor Ikuo Kabashima stated that scores were stranded after mud and floodwater gushed into the old age home.[4] According to a rescue volunteer, when they reached the old age home, the water was still on the first-floor level. The rescue personnel managed to rescue residents who had made it up to the second floor but were unable to reach those left below.[8] According to the staff at the home, they roused residents at 5 a.m. and shuffled them upstairs. On the first floor, when water came into the building, they placed residents with wheelchairs on top of tables in the dining room. The staff was unable to rescue the deceased residents after water broke through the windows and the patients floated off the tables.[11][12]

Following overnight rains, authorities instructed more than 75,000 residents to evacuate in the prefectures of Kumamoto and Kagoshima.[13] 203,200 residents were instructed to shelter in place, and 109 shelters were opened in the region.[6]

The Kuma River overran its bank in eleven different locations and breached one levee.[14] In Kuma, Kumamoto, stranded residents were rescued by a rescue helicopter.[13] Eight homes were swept away in Ashikita, Kumamoto.[7] In Tsunagi, Kumamoto, 2–3 people were pulled out of a landslide without signs of life.[13] Some 8,000 homes were left without power in Kumamoto and Kagoshima according to the Kyushu Electric Power Company.[13] Another 6,100 houses were estimated to be submerged, 11 bridges destroyed[15] and 4,700 buildings destroyed, damaged or flooded.[3]

A dike was breached near the town of Hitoyoshi, normally known for its hot springs and boating, which was flooded by the Kuma River. Volunteers from the local rafting association in Hitoyoshi used their rafts to rescue stranded residents in the flooded town. At least 17 people in Hitoyoshi died.[16][6][13]

On the morning of 7 July, the Chikugo River overflowed in Hita, Ōita leading authorities to issue the highest level alert to residents.[17]

Effects
Homes submerged by the Kuma River on 4 July 2020.

The flooding has also disrupted economic activity in Kyushu, an important manufacturing area in Japan. Companies including Toyota, Canon, and Panasonic temporarily halted production in the area as a precaution for employee safety.[18] However, Chief Cabinet Secretary Yoshihide Suga, in a statement on 6 July, said he did not expect major supply chain disruptions.[10]

Evacuees and local officials raised concerns regarding emergency shelter given the simultaneously ongoing COVID-19 pandemic.[19][20] Evacuees arriving at shelters had their temperatures checked, or were asked to go elsewhere so that social distancing could be maintained. Some evacuees chose to take refuge in their cars, while others stayed with friends.[19] These measures follow recommendations created the previous month in June when government officials anticipated a possible "double disaster" of flooding and disease transmission.[19][21]

Government response

Prime Minister Shinzo Abe ordered the creation of a special task force, dispatched 10,000 Japan Self-Defense Forces troops to the area, and vowed to rescue the missing.[13][4] On 5 July 2020, it was reported that 40,000 Self-Defense troops, Coast Guard sailors, and firemen were deployed in the rescue operation.[8] On 7 July, the number of deployed SDF troops was doubled to 80,000.[17]

On 7 July, Japanese authorities warned that further heavy rains are expected in Kyushu.[10]

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See also

References
  1. "令和２年７月３日からの豪雨の名称について" [About the name of the heavy rain] (Press release) (in Japanese). 9 July 2020.
  2. 豪雨被害 熊本県中心に77人死亡 7人行方不明 https://www3.nhk.or.jp/news/html/20200716/k10012518671000.html
  3. "令和2年7月豪雨による被害及び消防機関等の対応状況" (PDF). FDMA. 16 July 2020. Retrieved 17 July 2020.
  4. Mullany, Gerry (4 July 2020). "Severe Flooding in Southern Japan Swamps Nursing Home". The New York Times.
  5. "Kuma River floods cities after record rainfall". The Japan News. Retrieved 4 July 2020.
  6. "1 dead, 15 feared dead, 9 missing in rain, floods in southwest Japan". Kyodo News+. 4 July 2020. Retrieved 8 July 2020.
  7. "Many feared dead in flooded Japanese care home". BBC News. 4 July 2020.
  8. "Japan floods leave up to 34 dead, many at nursing homes". AP News. 5 July 2020. Retrieved 6 July 2020.
  9. Kyodo, Jiji (9 July 2020). "Rescuers battle to reach thousands trapped by floods in Kyushu". The Japan Times. Retrieved 9 July 2020.
  10. "Japan boosts rescue efforts as it warns of more rain in flood-hit areas". Reuters. 7 July 2020.
  11. "Japan Warns of More Flooding as Toll Reaches at Least 44; Several Others Missing". The Weather Channel.
  12. Arakaki, Takuya (6 July 2020). "Male nurse racked by guilt at failure to save elderly residents". The Asahi Shimbun. Retrieved 7 July 2020.
  13. "Heavy rain floods southern Japan, leaving many presumed dead, several missing". Australian Broadcasting Corporation. 4 July 2020.
  14. "Southwestern Japan hit by more heavy rain as death toll rises to 49". Kyodo News+. 6 July 2020. Retrieved 8 July 2020.
  15. "Southwestern Japan hit by more heavy rain as death toll rises to 49". Kyodo News. Retrieved 7 July 2020.
  16. "Japanese rafters paddle against the floods amid torrential Kyushu rains". Channel News Asia. AFP. 7 July 2020.
  17. "At least 53 dead as torrential rains and floodwaters hit Kyushu". The Japan Times. 7 July 2020. Retrieved 8 July 2020.
  18. "Deadly Japan floods halt factories across industrial base Kyushu". Nikkei Asian Review. Retrieved 7 July 2020.
  19. "Local gov'ts fret over coronavirus spread at shelters after torrential rain". Kyodo News. Retrieved 7 July 2020.
  20. Submission, Internal (9 July 2020). "Rescuers battle to reach thousands trapped by floods in Kyushu". The Japan Times. Retrieved 29 July 2020.
  21. Reynolds, Isabel (22 June 2020). "Japan Braces for Double Disaster of Covid Outbreaks at Flooding Shelters". Bloomberg. Retrieved 7 July 2020.
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