Portugal and Spain face heatwave with temperatures peaking at 47C

Temperatures are being driven higher by a hot air mass moving northward from Africa.

Forecasts are for a high of 44C in the Portuguese city of Evora, 130km east of Lisbon, and the Spanish province of Badajoz across the border.

Portuguese authorities have issued a nationwide health warning, including for dust moving up from the Sahara Desert, while warnings have also been issued for 40 of Spain's 50 provinces.

The Portuguese town of Beja is expected to record a peak of 47C on Saturday.

Spain's Meteorological Agency says thermometers are expected to begin dropping that day.

In eastern Europe, Poland was also enduring unusually high temperatures as the hot African air pushed temperatures up to 34C.

The country's power plants went into emergency mode to increase output due to wide use of air conditioning and electric fans.

Authorities in Warsaw placed cooling water installations in the streets and advised people to stay indoors if possible.