The Portuguese Institute for Sea and Atmosphere (Instituto Português do Mar e da Atmosfera or IPMA) has extended a yellow weather warning for high temperatures to 16 districts across mainland Portugal. The alert remains in effect until Wednesday, with temperatures in the interior expected to reach 37 degrees Celsius.
Yellow weather warnings extended across 16 districts
Sunday, 20 September 2026AI summary
Context & Explainers
A red warning is the highest alert level issued by Portugal's weather agency, the Portuguese Institute for the Sea and the Atmosphere (Instituto Português do Mar e da Atmosfera or IPMA), used when conditions pose a very high risk to life and property. Under a red warning authorities may close roads, suspend transport and advise people to avoid coastal and flood‑prone areas, so follow civil protection instructions during the Friday–Saturday storm period.
