Dozens of municipalities in the northern and central interior, as well as in the Algarve, are at very high risk, while many municipalities located in Alentejo and along the northern coast are at high risk, according to the Portuguese Institute of the Sea and Atmosphere (IPMA).

According to the institute's calculations, the rural fire danger will begin to increase starting Tuesday due to the expected rise in temperatures and will remain high at least until the weekend in some districts.

This danger, determined by the IPMA, has five levels, ranging from low to maximum. The calculations are obtained from air temperature, relative humidity, wind speed, and rainfall over the last 24 hours.

Due to the hot weather, the IPMA (National Institute of Maranhão) has issued a yellow warning for the districts of Bragança, Viseu, Évora, Guarda, Vila Real, Beja, Castelo Branco, and Portalegre, from 9:00 am on Tuesday to 6:00 pm on Wednesday.

The IPMA also issued a yellow warning for the south coast and mountainous regions of Madeira Island, from 9:00 am on Tuesday to 9:00 pm on Wednesday, due to the hot weather.

The IPMA forecasts partly cloudy or clear skies for the mainland today, stronger winds on the west coast and highlands, the possibility of morning fog, and a slight rise in temperatures, except for the maximum temperature on the coast of the central region, where a slight drop is expected.

Minimum temperatures will range from 12 degrees Celsius (in Guarda) to 18 degrees Celsius (in Aveiro and Lisbon), and maximum temperatures will range from 23 degrees Celsius (in Viana do Castelo) to 28 degrees Celsius (in Santarém and Bragança).

For the Madeira archipelago, the forecast is for generally cloudy skies, gradually decreasing in cloudiness from the morning onwards. There is a possibility of light showers in the highlands and on the northern slopes of Madeira Island, light to moderate winds, and a slight drop in maximum temperatures.

In Funchal, temperatures will range from 21 to 27 degrees Celsius, and in Porto Santo, from 19 to 25 degrees Celsius.