Live map › São Marcos da Serra (PT)

Wildfire near São Marcos da Serra (PT) · 156 ha - August 21, 2026

Heat zone156 ha

Detections2

Max. radiative power33.2 MW

Satellites recorded a wildfire near São Marcos da Serra (PT) from 21-08-2026 11:08 to 21-08-2026 11:08 (UTC). The measured heat zone covered roughly 156 ha (an upper bound based on pixel size, not an official fire perimeter). The event counted 2 satellite detections (S3A, MTG).

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Key figures

First detection	21-08-2026 11:08 UTC
Last detection	21-08-2026 11:08 UTC
Coordinates	`37.4413, -8.3245`

Surroundings

Nearest town: São Marcos da Serra (PT), about 10 km. Larger town nearby: Setúbal, about 130 km.

Observed by

This fire was seen by 2 satellite source(s): S3A, MTG. Polar satellites deliver sharp measurements but pass over a few times a day; geostationary satellites watch continuously with a coarser pixel.

How these figures are produced

FireSignal groups individual satellite detections into a single fire event. The heat zone is the sum of the measured pixels and is therefore an upper bound: it says where heat was observed, not how many hectares actually burned. Official figures from fire services or authorities are usually lower. Cloud and thick smoke block the view, so there is always a gap between two observations.