21st-century streets

Last summer, temperatures in the southern Spanish city of Seville hit more than 40 degrees Celsius (104 degrees Fahrenheit). The heatwave was so intense it earned itself a name: Heatwave Yago, the city’s second named event in two years. Seville, among other cities in Europe and around the world, is facing temperatures that it was … Read moreHow an ancient water tunnel design is cooling 21st-century streets