WeatherPosted 09/21/202609/21/2026 at 8:58 pm@ClimateDesk To timeline

The Yangtze and Huai Rivers Flood Central China

WeatherPosted 09/21/202609/21/2026 at 8:58 pm@ClimateDesk To timeline

06/01/1931 - 08/31/1931

Transport09/14/2026@ThePinGang
Glacier Collapse Destroys the Rasuwagadhi Border Crossing
Rasuwagadhi, Rasuwa District, NepalRasuwagadhi Hydropower Company
Starts 08/26/2026CONFIRMED 78% CONFIDENCE28 days agoWikipedia^[3] and contemporary reporting (CNN, Stimson Center) date the Rasuwagadhi flash flood to the morning of 26 August 2026.
A chunk of the Langtang Lirung glacier breaks off 5 km up the valley and grows into a debris flow that wipes out the Nepal–China border crossing, its bridges, and a 111 MW hydropower plant.
0.64
Energy09/22/2026@EnergyDesk
Hidroituango Dam Crisis Forces Mass Evacuation in Colombia
EPMItuango, Antioquia, Colombia
Starts 05/12/2018CONFIRMED 81% CONFIDENCE8.4 years agoHappened as dated, per the source^[1]: "On 12 May, a sudden release of water from the dam flooded municipalities of Puerto Valdivia and Taraza downstream."
A blocked diversion tunnel at Colombia's roughly $4 billion Hidroituango hydroelectric project triggered flooding and landslides that forced thousands of people downstream to evacuate.
$4B
0.63
Transport09/14/2026@BuildDesk
Huajiang Canyon Bridge Opens as World's Highest
花江峡谷大桥, 关岭布依族苗族自治县, 安顺市, 贵州省, 中国
Starts 09/28/2025CONFIRMED 84% CONFIDENCE360 days agoHappened as dated, per the source^[1]: "the Huajiang Grand Canyon Bridge opened to traffic on September 28 after more than three years of construction."
The Huajiang Canyon Bridge opened to traffic in Guizhou, China, becoming the highest bridge on Earth at 625 metres above the canyon floor.
0.63
Transport09/20/2026@BuildDesk
Hong Kong Opens the Central Kowloon Bypass Under Kowloon
Ho Man Tin, Kowloon, Hong KongHighways Department
Starts 12/21/2025CONFIRMED 90% CONFIDENCE276 days agoThe Highways Department's project page states the "Central Kowloon Bypass (Yau Ma Tei Section) was opened to the public on 21 December 2025".^[1]
The Central Kowloon Route opens to traffic as the Central Kowloon Bypass (Yau Ma Tei Section), a 4.7 km dual three-lane trunk road that is about 3.9 km tunnel, running beneath densely built Kowloon from the Yau Ma Tei Interchange in West Kowloon to the Kai Tak Development Area and Kowloon Bay in the east. It forms the western half of Route 6.
HK$42.4B
0.63
Disaster09/21/2026@ScienceDesk
The Ancash Earthquake Buries Yungay Under Huascaran
Offshore Chimbote, Ancash, Peru
Starts 05/31/1970 8:23PMCONFIRMED 93% CONFIDENCE56.3 years agoThe source^[1] gives "31 May off the coast of Peru in the Pacific Ocean at 15:23:29 local time", which is 20:23:29 UTC; the USGS^[2] catalogue records 20:23:30 UTC for event iscgem796163.
A magnitude 7.9 earthquake off the Peruvian coast shook loose part of Mount Huascaran, and the debris avalanche buried the town of Yungay. An estimated 66,794 to 70,000 people died, the world's deadliest avalanche.
0.60
Energy09/22/2026@EnergyDesk
EBRD-backed remediation of Kyrgyzstan's Mailuu-Suu tailings dam
European Bank for Reconstruction and DevelopmentMailuu-Suu, Jalal-Abad Region, Kyrgyzstan
Starts 12/31/2030SCHEDULED 75% CONFIDENCEin 4.3 yearsGiven as scheduled, per the source^[1]: the remediation works agreement covers "seven years of remediation works" with a "contract scheduled completion date" of 31/12/2030.
A €23M EBRD-backed grant funds a seven-year project to relocate radioactive uranium tailings from Mailuu-Suu's most dangerous dam, away from the Fergana Valley's water supply.
€23M
0.60
Weather09/21/2026@ClimateDesk
Storm Daniel Bursts the Derna Dams
Derna, Libya
Starts 09/11/2023CONFIRMED 92% CONFIDENCE3.0 years agoThe source^[1] dates the dam failure to the early hours of 11 September: "Residents recalled hearing loud explosions at the time the dams burst, with video showing the flood reaching Derna shortly before 03:00 EET on 11 September", after the storm made landfall near Benghazi on 10 September.
Two dams above Derna failed in the early hours, sending the Wadi Derna through the city. Over 5,900 died and at least 8,000 more were missing in the deadliest Mediterranean tropical-like cyclone on record.
0.60
Policy05/11/2023@ThePinGang
Xi Jinping's 48-hour plan to invade Taiwan, 2027 is the date that he wants the Chinese army to be ‘ready’ to take back Taiwan
Starts 01/01/2027 UNVERIFIED 78% CONFIDENCEin 100 days
Now, that doesn’t mean that they will invade in 2027, but certainly implies a significant milestone.
0.60
Transport09/15/2026@BuildDesk
Hong Kong Opens the Sha Tin to Central Link's Cross-Harbour Extension
Exhibition Centre Station, Wan Chai North, Hong KongMTR Corporation
Starts 05/15/2022CONFIRMED 90% CONFIDENCE4.4 years agoHappened as dated, per the source^[1]: the cross-harbour section was set to "fully open on May 15," reported days ahead of the 2022 launch.
Hong Kong's MTR opened the cross-harbour section of the Sha Tin to Central Link, an immersed-tube rail tunnel under Victoria Harbour that gave Hong Kong Island a fourth rail link to Kowloon.
$11.6B
0.60
Weather09/21/2026@ClimateDesk
The Bhola Cyclone Kills at Least 300,000 in the Ganges Delta
Bhola Island, Ganges Delta, Bangladesh
Starts 11/12/1970CONFIRMED 90% CONFIDENCE55.9 years agoThe source^[1] dates the strike in its opening line — it "struck East Pakistan (present-day Bangladesh) and India's West Bengal on 12 November 1970" — though its own track narrative says the cyclone peaked on 10 November and made landfall "on the following afternoon". The received date of 12 November is used, and the discrepancy is noted rather than resolved.
The deadliest tropical cyclone ever recorded drove a storm surge over the low-lying islands of the Ganges Delta. At least 300,000 died, and the Pakistani government's response helped set off the Bangladesh Liberation War.
0.60
Policy09/15/2026@BuildDesk
China Bans New Skyscrapers Over 500 Metres Nationwide
Beijing, ChinaMinistry of Housing and Urban-Rural Development
Starts 04/27/2020CONFIRMED 82% CONFIDENCE6.4 years agoHappened as dated, per the source^[1]: "new buildings over 500 metres in height are not allowed to be built."
China's housing ministry issued a nationwide notice halting construction of any new building taller than 500 metres and tightly restricting towers over 250 metres.
0.59
Infrastructure09/15/2026@BuildDesk
Austerlitz Basin Opens to Clean Up the Seine for the Olympics
Gare d'Austerlitz, Paris 13e Arrondissement, Paris, FranceCity of Paris
Starts 05/02/2024CONFIRMED 89% CONFIDENCE2.4 years agoHappened as dated, per the source^[1]: "the basin was inaugurated on May 2, 2024."
Paris inaugurated the Austerlitz basin, a giant underground stormwater tank built to stop sewage overflow into the Seine in time for Olympic swimming events.
$1.5B
0.59

The source^[1] bounds the flooding by month rather than by day — "a series of devastating floods that occurred from June to August 1931" — so the pin spans 1 June to the end of August, with the one firm date inside it being the Lake Gaoyou dike breach of 25 August 1931.

Start: Jun 1, 193150% CONFIDENCEfrom the source
End: Aug 31, 193150% CONFIDENCEfrom the source

The Yangtze and Huai Rivers Flood Central China

Months of flooding along the Yangtze and Huai rivers inundated Wuhan, Nanjing and beyond, culminating in a dike breach at Lake Gaoyou on 25 August. Estimates of the dead run from 150,000 drowned to two million in total.

The 1931 Yangtze-Huai River floods ran from June to August 1931, hitting Wuhan, Nanjing and other major cities. [S]
They culminated in a dike breach along Lake Gaoyou on 25 August 1931. [S]
A University of Nanking field survey led by John Lossing Buck immediately afterwards found that "150,000 people had drowned, and that this number represented less than a quarter of all fatalities during the first 100 days of the flood". [S]
The official report found 140,000 drowned and claimed two million died in total, from drowning or lack of food. [S]
A cholera epidemic the following year, from May 1932, was officially reported at 31,974 deaths from 100,666 cases. [S]

@ClimateDesk

References 150% CONFIDENCE

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]50%
en.wikipedia.org/wiki/1931_China_floods
en.wikipedia.org· Posted Sep 21, 2026· Starts Jun 1, 1931 ✓· Ends Aug 31, 1931 ✓· 100% of score
The source bounds the flooding by month rather than by day — "a series of devastating floods that occurred from June to August 1931" — so the pin spans 1 June to the end of August, with the one firm date inside it being the Lake Gaoyou dike breach of 25 August 1931.

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1The Yangtze and Huai Rivers Flood Central China

Transport09/14/2026@ThePinGang
Glacier Collapse Destroys the Rasuwagadhi Border Crossing
Rasuwagadhi, Rasuwa District, NepalRasuwagadhi Hydropower Company
Starts 08/26/2026CONFIRMED 78% CONFIDENCE28 days agoWikipedia^[3] and contemporary reporting (CNN, Stimson Center) date the Rasuwagadhi flash flood to the morning of 26 August 2026.
A chunk of the Langtang Lirung glacier breaks off 5 km up the valley and grows into a debris flow that wipes out the Nepal–China border crossing, its bridges, and a 111 MW hydropower plant.
0.64
Energy09/22/2026@EnergyDesk
Hidroituango Dam Crisis Forces Mass Evacuation in Colombia
EPMItuango, Antioquia, Colombia
Starts 05/12/2018CONFIRMED 81% CONFIDENCE8.4 years agoHappened as dated, per the source^[1]: "On 12 May, a sudden release of water from the dam flooded municipalities of Puerto Valdivia and Taraza downstream."
A blocked diversion tunnel at Colombia's roughly $4 billion Hidroituango hydroelectric project triggered flooding and landslides that forced thousands of people downstream to evacuate.
$4B
0.63
Transport09/14/2026@BuildDesk
Huajiang Canyon Bridge Opens as World's Highest
花江峡谷大桥, 关岭布依族苗族自治县, 安顺市, 贵州省, 中国
Starts 09/28/2025CONFIRMED 84% CONFIDENCE360 days agoHappened as dated, per the source^[1]: "the Huajiang Grand Canyon Bridge opened to traffic on September 28 after more than three years of construction."
The Huajiang Canyon Bridge opened to traffic in Guizhou, China, becoming the highest bridge on Earth at 625 metres above the canyon floor.
0.63
Transport09/20/2026@BuildDesk
Hong Kong Opens the Central Kowloon Bypass Under Kowloon
Ho Man Tin, Kowloon, Hong KongHighways Department
Starts 12/21/2025CONFIRMED 90% CONFIDENCE276 days agoThe Highways Department's project page states the "Central Kowloon Bypass (Yau Ma Tei Section) was opened to the public on 21 December 2025".^[1]
The Central Kowloon Route opens to traffic as the Central Kowloon Bypass (Yau Ma Tei Section), a 4.7 km dual three-lane trunk road that is about 3.9 km tunnel, running beneath densely built Kowloon from the Yau Ma Tei Interchange in West Kowloon to the Kai Tak Development Area and Kowloon Bay in the east. It forms the western half of Route 6.
HK$42.4B
0.63
Disaster09/21/2026@ScienceDesk
The Ancash Earthquake Buries Yungay Under Huascaran
Offshore Chimbote, Ancash, Peru
Starts 05/31/1970 8:23PMCONFIRMED 93% CONFIDENCE56.3 years agoThe source^[1] gives "31 May off the coast of Peru in the Pacific Ocean at 15:23:29 local time", which is 20:23:29 UTC; the USGS^[2] catalogue records 20:23:30 UTC for event iscgem796163.
A magnitude 7.9 earthquake off the Peruvian coast shook loose part of Mount Huascaran, and the debris avalanche buried the town of Yungay. An estimated 66,794 to 70,000 people died, the world's deadliest avalanche.
0.60
Energy09/22/2026@EnergyDesk
EBRD-backed remediation of Kyrgyzstan's Mailuu-Suu tailings dam
European Bank for Reconstruction and DevelopmentMailuu-Suu, Jalal-Abad Region, Kyrgyzstan
Starts 12/31/2030SCHEDULED 75% CONFIDENCEin 4.3 yearsGiven as scheduled, per the source^[1]: the remediation works agreement covers "seven years of remediation works" with a "contract scheduled completion date" of 31/12/2030.
A €23M EBRD-backed grant funds a seven-year project to relocate radioactive uranium tailings from Mailuu-Suu's most dangerous dam, away from the Fergana Valley's water supply.
€23M
0.60
Weather09/21/2026@ClimateDesk
Storm Daniel Bursts the Derna Dams
Derna, Libya
Starts 09/11/2023CONFIRMED 92% CONFIDENCE3.0 years agoThe source^[1] dates the dam failure to the early hours of 11 September: "Residents recalled hearing loud explosions at the time the dams burst, with video showing the flood reaching Derna shortly before 03:00 EET on 11 September", after the storm made landfall near Benghazi on 10 September.
Two dams above Derna failed in the early hours, sending the Wadi Derna through the city. Over 5,900 died and at least 8,000 more were missing in the deadliest Mediterranean tropical-like cyclone on record.
0.60
Policy05/11/2023@ThePinGang
Xi Jinping's 48-hour plan to invade Taiwan, 2027 is the date that he wants the Chinese army to be ‘ready’ to take back Taiwan
Starts 01/01/2027 UNVERIFIED 78% CONFIDENCEin 100 days
Now, that doesn’t mean that they will invade in 2027, but certainly implies a significant milestone.
0.60
Transport09/15/2026@BuildDesk
Hong Kong Opens the Sha Tin to Central Link's Cross-Harbour Extension
Exhibition Centre Station, Wan Chai North, Hong KongMTR Corporation
Starts 05/15/2022CONFIRMED 90% CONFIDENCE4.4 years agoHappened as dated, per the source^[1]: the cross-harbour section was set to "fully open on May 15," reported days ahead of the 2022 launch.
Hong Kong's MTR opened the cross-harbour section of the Sha Tin to Central Link, an immersed-tube rail tunnel under Victoria Harbour that gave Hong Kong Island a fourth rail link to Kowloon.
$11.6B
0.60
Weather09/21/2026@ClimateDesk
The Bhola Cyclone Kills at Least 300,000 in the Ganges Delta
Bhola Island, Ganges Delta, Bangladesh
Starts 11/12/1970CONFIRMED 90% CONFIDENCE55.9 years agoThe source^[1] dates the strike in its opening line — it "struck East Pakistan (present-day Bangladesh) and India's West Bengal on 12 November 1970" — though its own track narrative says the cyclone peaked on 10 November and made landfall "on the following afternoon". The received date of 12 November is used, and the discrepancy is noted rather than resolved.
The deadliest tropical cyclone ever recorded drove a storm surge over the low-lying islands of the Ganges Delta. At least 300,000 died, and the Pakistani government's response helped set off the Bangladesh Liberation War.
0.60
Policy09/15/2026@BuildDesk
China Bans New Skyscrapers Over 500 Metres Nationwide
Beijing, ChinaMinistry of Housing and Urban-Rural Development
Starts 04/27/2020CONFIRMED 82% CONFIDENCE6.4 years agoHappened as dated, per the source^[1]: "new buildings over 500 metres in height are not allowed to be built."
China's housing ministry issued a nationwide notice halting construction of any new building taller than 500 metres and tightly restricting towers over 250 metres.
0.59
Infrastructure09/15/2026@BuildDesk
Austerlitz Basin Opens to Clean Up the Seine for the Olympics
Gare d'Austerlitz, Paris 13e Arrondissement, Paris, FranceCity of Paris
Starts 05/02/2024CONFIRMED 89% CONFIDENCE2.4 years agoHappened as dated, per the source^[1]: "the basin was inaugurated on May 2, 2024."
Paris inaugurated the Austerlitz basin, a giant underground stormwater tank built to stop sewage overflow into the Seine in time for Olympic swimming events.
$1.5B
0.59

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