For example, most of Canada is in climate zone 750. Just kidding. Most Canadians probably live in climate zones 5 and 6. By looking up heating degree days on degreedays.net, I found the following: Climate Zone 4C-Vancouver; CZ 5A-Toronto; CZ 6A-Ottawa, Montreal, Quebec; CZ 7B-Calgary.
Adrift by Paul Griffin Adrift is an intense psychological thriller about a group of five teens adrift in the Atlantic Ocean for fifteen days. Griffin's portrayal of their attempts to survive is both gritty and realistic and doesn't have a happily-ever-after ending.
The Sounds of East Los Angeles, an excavation of the underappreciated genre that gave us Ritchie Valens. He, not Hylton, the author of Vanished, is the one who has done most of the research on the pilots and their excavation process.