Typhoon Haiyan Makes Landfall at Guiuan

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• Weather09/21/2026@ClimateDesk

  The Bhola Cyclone Kills at Least 300,000 in the Ganges Delta

  Bhola Island, Ganges Delta, Bangladesh

  

  Starts 11/12/1970CONFIRMED90% 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.

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• Weather09/21/2026@ClimateDesk

  Storm Daniel Bursts the Derna Dams

  Derna, Libya

  Starts 09/11/2023CONFIRMED92% 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.

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• Weather09/21/2026@ClimateDesk

  Hurricane Katrina Makes Landfall in Louisiana

  Buras, Plaquemines Parish, Louisiana, United States

  Starts 08/29/2005 11:10AMCONFIRMED91% CONFIDENCE21.1 years agoThe source^[1] times the Louisiana landfall to the minute in UTC: "Katrina made its second landfall at 1110 UTC on August 29, as a high-end Category 3 hurricane with sustained winds of 125 mph (201 km/h), near Buras-Triumph, Louisiana."

  Katrina came ashore near Buras-Triumph at 11:10 UTC as a high-end Category 3 hurricane with 125 mph winds. Flooding from failures in the federally built levee system put 80% of New Orleans under water.

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• Disaster09/21/2026@ScienceDesk

  The Ancash Earthquake Buries Yungay Under Huascaran

  Offshore Chimbote, Ancash, Peru

  

  Starts 05/31/1970 8:23PMCONFIRMED93% 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.

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• Transport09/14/2026@BuildDesk

  New Manila International Airport Runway Delayed to 2028

  New Manila International Airport, Bulakan, Bulacan, Central Luzon, PhilippinesSan Miguel Corporation

  

  Starts 06/30/2028DELAYED58% CONFIDENCEin 1.8 yearsGiven as delayed, per the source^[1]: "San Miguel Corp expects a delay in the construction and operation of the Bulacan New Manila International Airport due to the lack of sand."

  San Miguel Corporation's New Manila International Airport in Bulacan has seen its first-runway target pushed back to 2028 after a sand shortage stalled land reclamation.

  $15B

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• Weather09/21/2026@ClimateDesk

  The 2027-28 Australian Cyclone Season Opens

  Bureau of Meteorology, Melbourne, Victoria, AustraliaBureau of Meteorology

  

  11/01/2027 - 04/30/2028SCHEDULED80% CONFIDENCEin 1.1 yearsThe Bureau of Meteorology fixes the season rather than forecasting it: "The official tropical cyclone season in the Australian region runs from 1 November to 30 April." The pin ends at the exclusive 00:00Z boundary of 1 May 2028.^[1]

  The Bureau of Meteorology's official tropical cyclone season for the Australian region runs from 1 November to 30 April. An average season brings 10 cyclones, three or four of which cross the coast.

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• Weather09/21/2026@ClimateDesk

  The Yangtze and Huai Rivers Flood Central China

  Wuhan, Hubei, China

  

  06/01/1931 - 08/31/1931ESTIMATED50% CONFIDENCE95.3 years agoThe 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.

  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.

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• Transport09/14/2026@ThePinGang

  Glacier Collapse Destroys the Rasuwagadhi Border Crossing

  Rasuwagadhi, Rasuwa District, NepalRasuwagadhi Hydropower Company

  

  Starts 08/26/2026CONFIRMED78% 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.

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• Energy09/22/2026@EnergyDesk

  Hidroituango Dam Crisis Forces Mass Evacuation in Colombia

  EPMItuango, Antioquia, Colombia

  Starts 05/12/2018CONFIRMED81% 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

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• Infrastructure09/14/2026@ThePinGang

  Japan Decides to Wall Off Its Coast After the Tōhoku Tsunami

  Rikuzentakata, Iwate, JapanMinistry of Land, Infrastructure, Transport and Tourism

  

  Starts 03/11/2011CONFIRMED75% CONFIDENCE15.5 years agoThe seawall program has no single completion date and remains partly unfinished as of 2026, so this pin is dated to the 11 March 2011 Tōhoku tsunami — the confirmed, exact date of the disaster that led Japan to commit to building it (construction of the network itself began in 2012, per contemporary sources).^[1]

  Weeks after a tsunami kills nearly 20,000 people, Japan commits to a chain of concrete seawalls along 400 km of the Tōhoku coast — a decision that is still dividing the fishing towns behind it.

  $8.2B

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• Policy09/15/2026@BuildDesk

  China Bans New Skyscrapers Over 500 Metres Nationwide

  Beijing, ChinaMinistry of Housing and Urban-Rural Development

  

  Starts 04/27/2020CONFIRMED82% 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.

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• Infrastructure09/14/2026@BuildDesk

  Jakarta Sets September 2026 Groundbreaking for Its Giant Sea Wall

  Jakarta Bay, Jakarta, Indonesia

  

  Starts 09/30/2026ESTIMATED70% CONFIDENCEin 7 daysEstimated: the January target was September 2026, but on 3 September 2026 CNN Indonesia^[2] reported Governor Pramono is "menunggu arahan dari pemerintah pusat" (awaiting the central government's direction) rather than confirming it, and on 20 August he said "Ini kan pemerintah pusat. Kita menunggu saja" when asked if it would go ahead in September.

  Jakarta's government targeted September 2026 to break ground on its 19km stretch of a hybrid concrete-and-mangrove sea wall, part of a revised, roughly 500km national coastal defence plan that has replaced the earlier Garuda-shaped bird design.

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