Ash-covered cars still line the highway in , Hawaii, where hundreds of people recently tried in vain to escape from a fast-moving and fatal wildfire, like a scene out of a nightmare. In Canada, raging fires burned through more than 30 million acres of boreal forests, spewing noxious smoke and choking nearby communities with some of the worst air quality on Earth. And in Rhodes, Greece, more than 20,000 people fled for safety as flames fed on overgrown forests amid triple-digit temperatures, threatening historic villages. While the world sits stunned by the chaos and destruction of these fires,...