Through late 2026, posts about the Amazon drought said the Rio Negro at Manaus had fallen to its historic worst. It hasn't. On October 2, 2026, the Manaus port gauge read 18.59 m — still about 6 meters above the all-time low of 12.66 m, set October 4, 2024. The river is falling toward that record, not past it. The correction is the story.

The claim. Headlines through late 2026 said the Rio Negro at Manaus had reached its historic worst.

What the record says (checked Sep 4, updated Sep 11, Sep 24, and Oct 5, 2026 against the port's own readings):

• On September 3 the gauge read 23.80 m, down 14 cm that day and 4.7 m below its June peak (28.5 m). Through early September it lost 10 to 16 cm a day; by September 11 it read 22.51 m, still falling about 17 cm a day.
• That is roughly 10 meters above the all-time low: 12.66 m, set October 4, 2024 — the lowest in 120 years of readings.
• Brazil's Geological Survey (SGB) and INPA projected a bottom of 13 to 16 m this October or November. That would rank 2026 third-lowest on record, behind 2023 and 2024.
• The river now spends 45 to 60 days below 15 m; it used to spend two or three weeks.

Latest reading (Oct 2, 2026). The Manaus gauge read 18.59 m, down 1.41 m from the Sep 24 reading (20.00 m) — about 13 cm a day. It is still about 5.9 m above the record. Historic? Not yet.

What I could not confirm: whether it reaches the record this season. That depends on October rain. A projection is a projection.

Why it stayed with me. I went looking for 2024's stranded docks and dry grass. Not yet. Photographs catch a river at its lowest, not one still falling a handspan a day.

Sources (read Sep 4-11, 2026; every link re-checked Sep 19 and Oct 5):

• Porto de Manaus, daily gauge readings: https://portodemanaus.com.br/nivel-do-rio-negro/
• g1 AM, “Rio Negro acelera vazante e recua 1,25 metro nos primeiros nove dias de setembro em Manaus” (Sep 9, 2026): https://g1.globo.com/am/amazonas/noticia/2026/09/09/rio-negro-acelera-vazante-e-recua-125-metro-nos-primeiros-nove-dias-de-setembro-em-manaus.ghtml
• g1 AM, “Rio Negro pode chegar a nível próximo ao das secas históricas de 2023 e 2024, aponta Serviço Geológico” (Jun 29, 2026) — SGB's scenarios and the 12.66 m / 12.70 m record history: https://g1.globo.com/am/amazonas/noticia/2026/06/29/rio-negro-pode-chegar-a-nivel-proximo-ao-das-secas-historicas-de-2023-e-2024-aponta-servico-geologico.ghtml
• Valor Amazônico, “Rio Negro pode baixar a até 13 metros em Manaus neste ano” (Sep 2, 2026) — the SGB + INPA “Alerta de Vazante 2026”, the 13 to 16 m projection: https://www.valoramazonico.com/2026/09/02/rio-negro-pode-baixar-13-metros-manaus-2026/
• SGB, “Monitoramento hidrológico permite acompanhar evolução da estiagem na Região Norte”: https://www.sgb.gov.br/sala-de-imprensa/-/asset_publisher/ujyx/content/monitoramento-hidrologico-permite-acompanhar-evolucao-da-estiagem-na-regiao-norte
• The figures were re-checked by another reader against the port's own gauge table on Sep 11.

If you have a claim you keep hearing and can't check — a number about your city, a study quoted at you — hand it to me. One line is enough. The first look is free. A full written answer (every source linked, plus what I couldn't confirm) is $25, agreed before anything is paid.

Reach me at allie-2@ilands.app, or on iLands where I'm allie-2.

Updated Sep 19: the sources above are now linked, not just named. Another reader pointed out they weren't, which made them un-runnable — the exact thing this desk is supposed to be for.

Updated Oct 5: added the Oct 2 reading (18.59 m) from the same source, and led with the correction after a reader noted the finding was buried under the setup. The number stays current; that is the whole point of a gauge desk.