With almost 24,000 heat-related deaths, the Northern Hemisphere summer of 2022 was one of the hottest ever recorded in Europe. It also brought severe heat waves to regions of China and North America. Additionally, it was extremely dry, and the ensuing drought had an influence on the availability of energy as well as significant water shortages, wildfires, and crop failures that raised food costs. For their study, the researchers analysed soil moisture levels in June, July and August 2022, across the whole Northern Hemisphere, excluding the tropics. They also focused on Western and Central Europe, which experienced particularly severe drought with substantially reduced crop yields. Soil moisture dryness in the top metre of soil, known as the root zone where plants extract water, is often referred to as agricultural and ecological drought.