An orange warning from the Portuguese Institute for Sea and Atmosphere (Instituto Português do Mar e da Atmosfera) signals potentially dangerous weather or sea conditions that could cause significant damage or risk to life; it is one level below the highest red warning. For the coast, an orange alert (for example waves of 5–5.5 metres) means people should avoid sea activities, follow local authority advice and expect disruptions to maritime transport.

Local accommodation (alojamento local) means short-term tourist rentals—private apartments, houses or rooms rented for days or weeks—that must be registered and licensed with municipal authorities. Municipalities can suspend or cancel licences (Lisbon cancelled about 6,700 licences in early 2026), so travellers and hosts should check a listing's registration and local rules before booking or offering stays.

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.