Climate change

Axios -  "The temperature-related extreme events witnessed this summer will only become more intense, with more devastating consequences for people and the planet unless we take urgent action to reduce greenhouse gas emissions," Samantha Burgess, deputy director of the Copernicus Climate Change Service, said in a statement. 

Time -  This summer was the hottest ever in the Northern Hemisphere, putting the Earth on track for another record-breaking year. ... Climate change is increasing the frequency and intensity of heat waves, triggering extreme weather events from droughts and wildfires to violent storms and flooding. Over the past 12 months, the global average temperature was 1.64°C higher than pre-industrial levels, above the 1.5°C threshold that policymakers and scientists say threatens life on the planet....

Across the world, soaring temperatures are testing the limits of the human body, posing threats and even causing deaths at outdoor activities such as concerts, sports events, and religious gatherings. More than 1,300 people died during the Hajj pilgrimage in Saudi Arabia in June after temperatures reached 52°C (126°F). There were heat-related fatalities in nations including the U.S., Thailand, India, and Mexico this year.