The northern hemisphere is heating up as fires spread across Europe, while temperatures in the United States and China are rising.
Five separate high-pressure weather systems in the northern hemisphere, which are connected by atmospheric waves, have caused unprecedented temperatures on several continents. The UK broke its historic heat mark on Tuesday, as did several cities in Texas and Oklahoma, including Wichita Falls, which reached 115 degrees Fahrenheit (46.1 degrees Celsius) on Tuesday. As Europe’s heat …