Workers sweated in choking heat and pupils stayed home on Tuesday as an early-summer heatwave smothered much of Europe, with France suffering its hottest day on record. Schools and tourist sites closed early, and railways canceled journeys as several countries issued red alerts for much of their territory in the record-breaking heat. "It's getting a bit more unbearable, it's hot," said Vadim Bobu, a 31-year-old building worker laboring on a construction site in Paris. But "we don't have a