The Portuguese Institute for Sea and Atmosphere (Instituto Português do Mar e da Atmosfera or IPMA) has warned that temperatures in mainland Portugal will rise between June 10 and 13, reaching highs of 35°C to 40°C. This follows a recent heatwave in May that lasted 9.5 days, ranking as the second longest on record since 1964.
Heatwave warnings issued as temperatures climb to 40°C
Tuesday, 9 June 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.
