Itajaí-Açu river flood forecast
GloFAS reads the Itajaí-Açu at one place, Blumenau, where it drains 12,093 km². It is read in Brazil. For each point, the Global Flood Awareness System gives the chance that the river will exceed the flow it normally reaches only once every 2, 5 or 20 years.
GloFAS rates the Itajaí-Açu Medium.
GloFAS forecasts are computer model output, published for information only. They are not a flood warning: only national and regional authorities issue flood warnings for their own area. A reporting point is a place on the model's river network, which may sit a few kilometres from the town it is named after.
Every point GloFAS reads on the Itajaí-Açu
Blumenau, Brazil · drains 12,093 km²
A 27% chance of exceeding its 5-year flood flow; 64% for the 2-year and 5% for the 20-year.
GloFAS alert level: Medium · Peak expected: in 6 days (on 2026-10-25) · Rising
Nothing has been reported within 100 km of this river in the last 30 days by the agencies this site follows.
What a 2-, 5- or 20-year flood flow is
It is the river flow that, at that point, is reached or exceeded on average once every 2, 5 or 20 years. A 2-year flow typically fills the channel to its banks; a 5-year or 20-year flow goes further. It measures how unusual the flow is, not what it will damage — the same flow can flood a town that has no defences and pass one that does. And "once in 20 years" is an average: two can come in a row.
Contains modified Copernicus Emergency Management Service information 2026 — the Global Flood Awareness System (GloFAS). GloFAS.