Extreme FWI
Fire Weather Index (FWI) of 50 or more on the start day: the “extreme” and “very extreme” classes of the European EFFIS scale.
We are recalculating the FWI of every fire with the real local noon; the figure will be back when it is done.
LA · Laos
What weather do fires in Laos start in?
How many of the fires in Laos between 2016 and 2025, and how much of the area they burned, started with extreme FWI, strong wind, very dry air or after 60 days without rain. Based on the weather on each fire’s start day.
Strong wind
Gusts of 50 km/h or more on the start day (a gale, Beaufort force 7).
of the fires4.5 %
of the burned area4.0 %
From 2016 to 2025, 4.5 % of the fires in Laos started with gusts of 50 km/h or more and burned 4.0 % of the area.
Today: 0 of 18 regions Open the page
Very dry air
Minimum relative humidity below 15% on the start day.
Too few fires in this condition to give a reliable figure.
60 days without rain
At least 60 days in a row without 1 mm of rain before the start day.
of the fires2.1 %
of the burned area3.6 %
From 2016 to 2025, 2.1 % of the fires in Laos started after 60 days or more without rain and burned 3.6 % of the area.
Today: 0 of 18 regions Open the page
How to read these figures
Each figure compares two shares: how many fires started in that condition and how much of the area they burned. If the second is larger, those fires were bigger than the rest. A fire can meet several conditions at once. These are statistics about the past, not a forecast.
This is not an official warning.
Check the warnings of your local civil protection or forestry authority.
Suggested citation
WorldFires, “What weather do fires in Laos start in?”, https://worldfires.org/en/country/laos/fire-weather (accessed 12 November 2026). Sources: Copernicus Climate Change Service, ERA5 (Open-Meteo.com, CC BY 4.0), WorldFires (FWI, Van Wagner 1987), Copernicus GWIS, NASA FIRMS (VIIRS), ECMWF IFS (Open-Meteo.com, CC BY 4.0).
Sources: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service, ERA5 (Open-Meteo.com, CC BY 4.0) · WorldFires (FWI, Van Wagner 1987) · Copernicus GWIS · NASA FIRMS (VIIRS) · ECMWF IFS (Open-Meteo.com, CC BY 4.0)