Forecasts indicate that several inland regions could continue to see maximum temperatures above 40°C, while overnight lows may remain close to 30°C in some areas. These unusually warm nights can make the heat more difficult to manage, as homes and bodies have less chance to cool down after sunset.

The current heatwave is affecting much of mainland Portugal, with the interior expected to experience the most intense conditions. Parts of the Alentejo, Ribatejo, Beira Baixa and the Tagus Valley are among the areas likely to record some of the highest daytime temperatures.

Red weather warnings

IPMA has issued red weather warnings for hot weather in some districts, citing the persistence of extremely high maximum and minimum temperatures. The institute has also warned that the wider heatwave could last for several more days, with only some coastal areas likely to experience more moderate conditions.

The combination of very hot days and tropical or near-tropical nights raises particular health concerns for vulnerable groups, including elderly people, young children, pregnant women, people with chronic illnesses and outdoor workers.

Health recommendations

Health authorities advise people to drink water regularly, avoid direct sun exposure during the hottest hours of the day, reduce physical effort, wear light clothing and remain in cool or shaded places where possible. The government has also urged people to check on isolated relatives, neighbours and vulnerable members of the community during the heatwave.

The hot and dry conditions are also increasing wildfire risk across much of the country, particularly in inland areas where vegetation is under greater stress.

Although temperatures may begin to ease after the weekend in some regions, forecasters say parts of the interior could continue to experience very high temperatures into next week.