With nearly no rainfall since May, Sweden experienced its hottest July in more than 250 years, with the drought and high temperatures sparking wildfires across the country, even as far north as the Arctic Circle. Wheat fields have been devastated across northern Europe, driving up prices.
Large areas of Portugal are on red alert for heat, including the capital, Lisbon.
A boy jumps from a dock to the sea during a hot summer day in Barcelona, Spain.
Seeking to prevent more deaths after 114 people were killed in two massive forest blazes past year in Portugal, civil protection sent mobile text alerts warning the population of an extreme risk of fires in some regions, including around the capital Lisbon.
Last month, wildfires killed at least 91 people in Greece.
"Oh it's bad", said tourist Paul Snell.
Temperatures built to around 45C (113F) on Friday in many inland areas of Portugal, and are expected to peak at 47C (116.6F) in some places on Saturday. "I've been here in the summer but it has never been this hot".
The hottest temperature recorded in Spain on Friday was 44.7 Celsius in Badajoz, in Extremadura, while the mercury hit 44.5 Celsius in Seville, in Andalucia, according to CNN forecasters.
In Spain, extreme risk warnings were issued for 41 of the country's 50 provinces due to the hot weather. It has led to two deaths from suspected heatstroke in Murcia, southern Spain.
People cool themselves at the Trocadero Fountain in front of the Eiffel Tower in Paris, July 27, 2018, as a heatwave continues across northern Europe.
A branch of the K-Supermarket chain in Helsinki's Pohjois-Haaga district has invited 100 customers to sleep in its air-conditioned store on Saturday.
Temperatures approached 30C this week in Finland, where the August average is 19C.
In Germany, state rail operator Deutsche Bahn said it was offering free water to passengers in case of delays and would keep air conditioning running on its trains even when they are empty.
The Villette basin in Paris takes on the air of a seaside resort. Fishery authorities in the canton of Zurich were combing creeks to rescue fish from suffocation as streams dry up or oxygen levels plunge.
July's average United Kingdom maximum temperature was 22.6C from July 1-30, hotter than 1976's 21.6C, and the second-hottest since records began 108 years ago in 1910, behind only 2006's 23.2C.
The Spanish meteorology agency, AEMET, has issued an official warning of extreme temperatures, and authorities are already making emergency preparations for the dramatic heatwave.
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