ROME -- Stifling heat kept its grip on much of Southern Europe on Thursday, driving people indoors at midday, spoiling crops, triggering drinking water restrictions, turning public libraries into cooling 鈥渃limate shelters鈥� and complicating the already difficult challenge firefighters faced battling wildfires.
In many places, forecasters said worse was expected to come.
In Italy, 15 cities received warnings from the health ministry about high temperatures and humidity with peaks predicted for Friday. The cities included Rome, Florence and Palermo, but also Bolzano, which is usually a refreshing hot-weather escape in the Alps,
The local National Health Service offices in Rome and Bologna telephoned older residents who live alone to see if they needed groceries or medicines delivered so they wouldn't venture out in the searing heat.
The Italian air force, which oversees the national weather service, said the interior parts of the islands of Sardinia and Sicily could expect to see temperatures upwards of 40 degrees Celsius (104 F) by Friday. By early afternoon on Thursday in Rome, the city famous for its ornamental as well as strategically placed sidewalk drinking fountains sizzled in 38 C (100 F) heat.
鈥淚 drink a lot of water, more water, more water and more water,鈥� said Hank Heerat, a tourist from the Netherlands cycling down the broad boulevard flanking the Roman Forum.
At the ancient Colosseum, Civil Protection volunteers distributed hundreds of bottles of water to visitors.
In Serbia, the spell of hot, dry weather prompted four municipalities to declare an emergency after Rzav River levels plummeted, endangering water supplies. Authorities imposed drinking water restrictions affecting some 250,000 people, while the army brought in water tanks for public use.
鈥淲e have a period of severe drought, we cannot take any more water from the river,鈥� Zoran Barac, the head of a local water supply utility, told state broadcaster RTS.
In Spain, the national weather service warned temperatures could hit 44 C (111 F) in some areas in coming days. Parts of the northeastern Catalonia region were forecast to reach 42 C (107.6 F) on Thursday.
Authorities in Barcelona, the Catalan capital, designated 162 museums, libraries, schools and other public places around the city as 鈥渃limate shelters.鈥� The sites offered an escape from the heat, cool drinking water and staff trained in dealing with heatstroke.
The surge in temperatures, due to a mass of hot, dry air from Africa, was expected to ease starting on Monday on the Iberian peninsula.
While Southern Europe is known for sunny, hot summers, climate scientists say there's little doubt climate change from the burning of coal, oil and natural gas is driving extreme events such as heat waves, droughts and wildfires, which they say are likely to happen more frequently as Earth warms.
A German tourist in Rome concurred.
Because of climate change, 鈥渢emperatures are very high. So I think it's a better option is to reduce the carbon dioxide from the cars and travel more with the metro,鈥� said Philippe Kutaski near the Colosseum in Rome.
As in past years, Croatia's Adriatic Sea resorts were hosting hundreds of thousands of tourists. But those stepping out of the sea sweltered as temperatures reached 39 C (102 F) on the coast on Wednesday.
Crops and farm animals were suffering from days of extremely high temperature, too.
The Italian agriculture lobby Coldiretti said Thursday that 20% of the tomato crop in Italy's south was lost due to torrid heat and humidity. Italy exports nearly 2 billion euros ($2.4 billion) worth of tomatoes and tomato products like canned or bottled sauce throughout the world.
Dairy farmers in southern Italy estimated that the heat wave meant cows were eating less, producing 20% less milk and drinking double the usual amount of water.
While much attention has focused on southern Europe's heat crisis, it was even hotter on the North African shore of the Mediterranean Sea. Temperatures hit 50 C (122 F) in Tunisia, a record high for the country. The last previous high was 48.2 C (nearly 119 F) in 1968.
In Algeria, most of the regions of the north of the country have been placed on alert for heat waves. Fires ravaging mountain forests and villages in Algeria's Berber region have killed at least 65 people, including 28 soldiers.
Blazes have devoured forest and brush areas in Greece and in southern Italy for days.
In Italy, temperatures in the mid-40s C (over 110 F) in inland parts of Sardinia, Calabria and Sicily made for ripe fire conditions. But long spells of drought also were blamed. By the start of summer in Italy, vegetation had already withered from lack of rain and 鈥渆ssentially became fuel鈥� for wildfires, Italian Civil Protection official Luigi D'Angelo told Italian state TV.
Michele Calamaio in Rome, Barry Hatton in Lisbon, Jovana Gec in Belgrade, Sylvie Corbet in Paris, contributed reporting.
