Météo21/09/2026@ClimateDesk
Hurricane Katrina Makes Landfall in Louisiana
Buras, Plaquemines Parish, Louisiana, United States
Commence le 29/08/2005 11:10CONFIRMÉ CONFIANCE 91 %il y a 21,1 ansThe 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.
0.62
Météo21/09/2026@ClimateDesk
The Bhola Cyclone Kills at Least 300,000 in the Ganges Delta
Bhola Island, Ganges Delta, Bangladesh
Commence le 12/11/1970CONFIRMÉ CONFIANCE 90 %il y a 55,9 ansThe 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.
0.61
Énergie22/09/2026@EnergyDesk
Hidroituango Dam Crisis Forces Mass Evacuation in Colombia
EPMItuango, Antioquia, Colombia
Commence le 12/05/2018CONFIRMÉ CONFIANCE 81 %il y a 8,4 ansHappened 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
0.60
Météo21/09/2026@ClimateDesk
Typhoon Haiyan Makes Landfall at Guiuan
Guiuan, Eastern Samar, Philippines
Commence le 07/11/2013 20:40CONFIRMÉ CONFIANCE 87 %il y a 12,9 ansThe landfall is timed in UTC by the source^[1]: "At 20:40 UTC on November 7, 2013, the eye of the typhoon made its first landfall in the Philippines at Guiuan, Eastern Samar at maximum strength." That is early on 8 November local time, the date the storm is known by in the Philippines.
One of the most intense tropical cyclones ever recorded came ashore in Eastern Samar at peak strength, with PAGASA measuring ten-minute winds of 235 km/h. At least 6,300 died in the Visayas alone.
0.60
Transports14/09/2026@ThePinGang
Glacier Collapse Destroys the Rasuwagadhi Border Crossing
Rasuwagadhi, Rasuwa District, NepalRasuwagadhi Hydropower Company
Commence le 26/08/2026CONFIRMÉ CONFIANCE 78 %il y a 28 joursWikipedia^[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.
0.60
Infrastructures14/09/2026@BuildDesk
New York Harbor Storm Surge Plan
Rockaway Beach, Queens, New York, USAUS Army Corps of Engineers
Commence le 31/12/2044ESTIMÉ CONFIANCE 67 %dans 18,3 ansA target, per the source^[1]: if approved, "work would begin in 2030 and be completed by 2044"; as of now the plan "has not yet received final approval."
The US Army Corps of Engineers is advancing a $52.6BN plan of storm-surge gates, sea walls and levees around New York Harbor, after shelving a more radical $119BN 'mega sea wall' spanning the harbor mouth.
$52.6B
0.60
Climat15/09/2026@BuildDesk
Les barrages du fleuve Klamath entièrement démantelés
Iron Gate Dam, Siskiyou County, California, United StatesKlamath River Renewal Corporation
Commence le 02/10/2024CONFIRMÉ CONFIANCE 90 %il y a 2 ansL'événement a bien eu lieu à la date indiquée, selon la source : « Le projet de restauration du fleuve Klamath a achevé les derniers travaux de démantèlement des barrages ».^[1]
Les équipes ont achevé en 2024 le démantèlement des quatre barrages hydroélectriques du fleuve Klamath, le plus grand chantier de suppression de barrages et de restauration fluviale de l'histoire des États-Unis.
0.60
Infrastructures15/09/2026@BuildDesk
Afsluitdijk's Storm-Proofing Upgrade Wraps Up in the Netherlands
Breezanddijk, Afsluitdijk, NetherlandsLevvel
Commence le 01/06/2023ESTIMÉ CONFIANCE 64 %il y a 3,3 ansHappened as dated, per the source^[1]: "completed the work in 2023."
The Levvel consortium finished reinforcing the 32-kilometre Afsluitdijk sea wall with tens of thousands of custom concrete blocks so it can withstand a one-in-10,000-year storm.
$617M
0.59
Catastrophe21/09/2026@ScienceDesk
Mount St. Helens Blows Out Its North Face
Mount St. Helens, Skamania County, Washington, United States
Commence le 18/05/1980 15:32CONFIRMÉ CONFIANCE 88 %il y a 46,3 ansThe moment is recorded to the second: "An earthquake at 8:32:11 am PDT (UTC-7) on May 18, 1980, caused the entire weakened north face to slide away", which is 15:32:11 UTC.^[1]
An earthquake at 8:32 a.m. local time dropped the volcano's weakened north face away in the largest subaerial landslide on record, uncorking a lateral blast toward Spirit Lake. Fifty-seven people were killed.
0.58
Architecture15/09/2026@BuildDesk
Construction Begins on The Delmore, Surfside Collapse Site
8777 Collins Avenue, Surfside, Florida, United StatesDAMAC International
Commence le 26/02/2025CONFIRMÉ CONFIANCE 88 %il y a 1,6 anHappened as dated, per the source^[1]: DAMAC International "unveils The Delmore... and commences construction" at the Surfside site.
DAMAC International broke ground on The Delmore, a Zaha Hadid Architects-designed condo tower replacing the collapsed Champlain Towers South, with far fewer, far pricier units than before.
$15M
0.58
Énergie22/09/2026@EnergyDesk
New Spitallamm Dam Replaces Century-Old Cracked Wall
Kraftwerke OberhasliSpitallamm Dam, Grimsel Pass, Bern, Switzerland
Commence le 31/12/2025ESTIMÉ CONFIANCE 65 %il y a 266 joursSources place the new dam's completion in 2025 - some reporting it already in operation by autumn 2025 - with the powerplant's full restart following in 2026; no single confirmed completion date was found.^[1]
Swiss utility KWO finished building a new 113-metre arch dam directly in front of its cracked 1932 predecessor high in the Grimsel Pass.
0.58
Météo21/09/2026@ClimateDesk
The Yangtze and Huai Rivers Flood Central China
Wuhan, Hubei, China
Du 01/06/1931 au 31/08/1931ESTIMÉ CONFIANCE 50 %il y a 95,3 ansThe 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.
0.57

The 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.

Début: 11 sept. 2023CONFIANCE 90 %selon la source

Storm Daniel Bursts the Derna Dams

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.

Storm Daniel became the deadliest Mediterranean tropical-like cyclone on record and the second-costliest tropical cyclone outside the North Atlantic. [S]
It formed as a low-pressure system around 4 September 2023, flooded Greece, Bulgaria and Turkey, then organised as a Mediterranean low and turned toward Libya, making landfall near Benghazi on 10 September. [S]
Two dams above Derna failed; the flood reached the city shortly before 03:00 EET on 11 September, sending the Wadi Derna through it. [S]
Over 5,900 people died and 7,000 were injured, with at least 8,000 missing. [S]
Libya's vulnerability was blamed on its civil war, which had damaged critical infrastructure and left it in poor condition beforehand. [S]
The storm was the product of an omega block — a high-pressure zone between two lows, with isobars shaped like the Greek letter. [S]
In Greece the rainfall caused over two billion euros in damage, the costliest recorded storm for the country. [S]

@ClimateDesk

Références 2CONFIANCE 92 %

La première entrée est toujours la source de l’épingle. La confiance globale est une moyenne pondérée de la fermeté avec laquelle chaque référence étaye les heures de début et de fin retenues ci-dessus ; une référence compte moitié moins pour chaque tranche de 180 jours d’ancienneté par rapport à la plus récente.

[1]90%
en.wikipedia.org/wiki/Storm_Daniel
en.wikipedia.org· Publié le 21 sept. 2026· Début 11 sept. 2023 ✓· 50 % du score
The source 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.
[2]93%
Storm Daniel leads to extreme rain and floods in Mediterranean, heavy loss of life in Libya
wmo.int· Ajouté le 21 sept. 2026· 50 % du score
WMO's own statement on the event supplies the rainfall that broke the dams - "Torrential rains of between 150 - 240 mm caused flash floods in several cities, including Al-Bayda, which recorded the highest daily rainfall rate of 414.1 mm (from 10 Sep 8am to 11 Sep 8am)" - and confirms the Derna dam failure.

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1Storm Daniel Bursts the Derna Dams

Météo21/09/2026@ClimateDesk
Hurricane Katrina Makes Landfall in Louisiana
Buras, Plaquemines Parish, Louisiana, United States
Commence le 29/08/2005 11:10CONFIRMÉ CONFIANCE 91 %il y a 21,1 ansThe 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.
0.62
Météo21/09/2026@ClimateDesk
The Bhola Cyclone Kills at Least 300,000 in the Ganges Delta
Bhola Island, Ganges Delta, Bangladesh
Commence le 12/11/1970CONFIRMÉ CONFIANCE 90 %il y a 55,9 ansThe 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.
0.61
Énergie22/09/2026@EnergyDesk
Hidroituango Dam Crisis Forces Mass Evacuation in Colombia
EPMItuango, Antioquia, Colombia
Commence le 12/05/2018CONFIRMÉ CONFIANCE 81 %il y a 8,4 ansHappened 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
0.60
Météo21/09/2026@ClimateDesk
Typhoon Haiyan Makes Landfall at Guiuan
Guiuan, Eastern Samar, Philippines
Commence le 07/11/2013 20:40CONFIRMÉ CONFIANCE 87 %il y a 12,9 ansThe landfall is timed in UTC by the source^[1]: "At 20:40 UTC on November 7, 2013, the eye of the typhoon made its first landfall in the Philippines at Guiuan, Eastern Samar at maximum strength." That is early on 8 November local time, the date the storm is known by in the Philippines.
One of the most intense tropical cyclones ever recorded came ashore in Eastern Samar at peak strength, with PAGASA measuring ten-minute winds of 235 km/h. At least 6,300 died in the Visayas alone.
0.60
Transports14/09/2026@ThePinGang
Glacier Collapse Destroys the Rasuwagadhi Border Crossing
Rasuwagadhi, Rasuwa District, NepalRasuwagadhi Hydropower Company
Commence le 26/08/2026CONFIRMÉ CONFIANCE 78 %il y a 28 joursWikipedia^[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.
0.60
Infrastructures14/09/2026@BuildDesk
New York Harbor Storm Surge Plan
Rockaway Beach, Queens, New York, USAUS Army Corps of Engineers
Commence le 31/12/2044ESTIMÉ CONFIANCE 67 %dans 18,3 ansA target, per the source^[1]: if approved, "work would begin in 2030 and be completed by 2044"; as of now the plan "has not yet received final approval."
The US Army Corps of Engineers is advancing a $52.6BN plan of storm-surge gates, sea walls and levees around New York Harbor, after shelving a more radical $119BN 'mega sea wall' spanning the harbor mouth.
$52.6B
0.60
Climat15/09/2026@BuildDesk
Les barrages du fleuve Klamath entièrement démantelés
Iron Gate Dam, Siskiyou County, California, United StatesKlamath River Renewal Corporation
Commence le 02/10/2024CONFIRMÉ CONFIANCE 90 %il y a 2 ansL'événement a bien eu lieu à la date indiquée, selon la source : « Le projet de restauration du fleuve Klamath a achevé les derniers travaux de démantèlement des barrages ».^[1]
Les équipes ont achevé en 2024 le démantèlement des quatre barrages hydroélectriques du fleuve Klamath, le plus grand chantier de suppression de barrages et de restauration fluviale de l'histoire des États-Unis.
0.60
Infrastructures15/09/2026@BuildDesk
Afsluitdijk's Storm-Proofing Upgrade Wraps Up in the Netherlands
Breezanddijk, Afsluitdijk, NetherlandsLevvel
Commence le 01/06/2023ESTIMÉ CONFIANCE 64 %il y a 3,3 ansHappened as dated, per the source^[1]: "completed the work in 2023."
The Levvel consortium finished reinforcing the 32-kilometre Afsluitdijk sea wall with tens of thousands of custom concrete blocks so it can withstand a one-in-10,000-year storm.
$617M
0.59
Catastrophe21/09/2026@ScienceDesk
Mount St. Helens Blows Out Its North Face
Mount St. Helens, Skamania County, Washington, United States
Commence le 18/05/1980 15:32CONFIRMÉ CONFIANCE 88 %il y a 46,3 ansThe moment is recorded to the second: "An earthquake at 8:32:11 am PDT (UTC-7) on May 18, 1980, caused the entire weakened north face to slide away", which is 15:32:11 UTC.^[1]
An earthquake at 8:32 a.m. local time dropped the volcano's weakened north face away in the largest subaerial landslide on record, uncorking a lateral blast toward Spirit Lake. Fifty-seven people were killed.
0.58
Architecture15/09/2026@BuildDesk
Construction Begins on The Delmore, Surfside Collapse Site
8777 Collins Avenue, Surfside, Florida, United StatesDAMAC International
Commence le 26/02/2025CONFIRMÉ CONFIANCE 88 %il y a 1,6 anHappened as dated, per the source^[1]: DAMAC International "unveils The Delmore... and commences construction" at the Surfside site.
DAMAC International broke ground on The Delmore, a Zaha Hadid Architects-designed condo tower replacing the collapsed Champlain Towers South, with far fewer, far pricier units than before.
$15M
0.58
Énergie22/09/2026@EnergyDesk
New Spitallamm Dam Replaces Century-Old Cracked Wall
Kraftwerke OberhasliSpitallamm Dam, Grimsel Pass, Bern, Switzerland
Commence le 31/12/2025ESTIMÉ CONFIANCE 65 %il y a 266 joursSources place the new dam's completion in 2025 - some reporting it already in operation by autumn 2025 - with the powerplant's full restart following in 2026; no single confirmed completion date was found.^[1]
Swiss utility KWO finished building a new 113-metre arch dam directly in front of its cracked 1932 predecessor high in the Grimsel Pass.
0.58
Météo21/09/2026@ClimateDesk
The Yangtze and Huai Rivers Flood Central China
Wuhan, Hubei, China
Du 01/06/1931 au 31/08/1931ESTIMÉ CONFIANCE 50 %il y a 95,3 ansThe 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.
0.57

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