The orange warning for these four districts will be in force between 3:00 pm on Tuesday and 00:00 am on Wednesday.
The districts of Viana do Castelo, Braga and Vila Real are already under yellow warning until 6pm today due to the rain, and will then become orange on Tuesday.
The Portuguese Institute of the Sea and Atmosphere (IPMA) also issued an orange warning for the entire Portuguese coast due to strong sea disturbances.
The bad weather forecast for the next few days led the National Emergency and Civil Protection Authority (ANEPC) to issue a warning to the population on Sunday, warning of the possibility of urban flooding, floods and landslides.