At maximum risk of fire are the municipalities of Monchique, Portimão, Silves, Loulé, São Brás de Alportel and Tavira (Faro), Nisa and Gavião (Portalegre), Mação (Santarém), Vila Velha de Ródão, Proença-a-Nova and Fundão (Castelo Branco), Figueira Castelo Rodrigo (Guarda), Torre de Moncorvo, Freixo de Espada à Cinta, Mogadouro, Alfândega da Fé, Macedo de Cavaleiros, Miranda do Douro and Vimioso (Bragança).
The IPMA also placed about 60 counties in the districts of Faro, Santarém, Portalegre, Castelo Branco, Guarda, Castelo Branco, Viseu, Vila Real and Bragança in very high risk of fire.
According to IPMA, there are also more than 70 districts of several mainland districts at high risk.
The fire risk will intensify in some regions of mainland Portugal at least until the end of the week.
The fire risk determined by IPMA has five levels, ranging from low to maximum.
The calculations are obtained from the air temperature, relative humidity, wind speed and amount of precipitation in the last 24 hours.
The IPMA forecasts for today on the continent little cloudy or clear sky, with morning cloudiness on the coast north of Cabo Raso, and north wind, more intense in the western coastal strip.
The forecast also points to a slight increase in the maximum temperature in the Centre and South and morning fog or mist in some parts of the North and Centre coast.
The minimum temperatures on the mainland will range between 10 degrees Celsius (in Viana do Castelo) and 20 (in Faro) and maximum between 19 degrees (in Aveiro) and 35 (in Evora and Beja).