The Portuguese Institute for Sea and Atmosphere (Instituto Português do Mar e da Atmosfera or IPMA) has issued a warning for a gradual rise in temperatures starting this Saturday. A warm, dry air mass is expected to push maximum temperatures to 38°C in the Alentejo and Tagus Valley regions. The institute suggests that this weather pattern could lead to another heatwave across the country.
IPMA warns of rising temperatures and heatwave conditions
Wednesday, 16 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.
6 sources
- Hot air mass hits Portugal on Saturday. IPMA warns that another heatwave may be on the waycnnportugal.iol.pt ·
- Hot air mass hits Portugal on SaturdayTVI ·
- A warm air mass is coming. A gradual rise in temperature is expected from Saturdaycmjornal.pt ·
- A warm air mass is coming: temperatures will rise again starting Saturdayrtp.pt ·
- A heatwave is coming from Saturday: 30 to 38ºCobservador.pt ·
- New heatwave on the way, with temperatures rising from Saturdaypublico.pt ·
