In the districts of Porto, Faro, Santarém, Leiria, Beja, Aveiro and Coimbra, the warning will be in effect between 12pm today and midnight on Thursday.
The districts of Viseu, Évora, Guarda, Castelo Branco and Portalegre will be under the warning between 12:00 today and 00:00 on Thursday and then between 12:00 on Thursday and 00:00 on Friday.