The IPMA has also placed the municipalities of Lagos, Portimão, Monchique, Silves, Loulé, Alcoutim (Faro) and Almodôvar (Beja) at high risk of fire.
The rest of the country is at moderate or reduced danger, but an increase is expected from Tuesday.
Today minimum temperatures will fluctuate between 8 degrees Celsius (in Bragança) and 16 (in Faro) and the maximum between 19 (in Guarda) and 28 (in Santarém).