CO2: 432.34 ppmTemperature of 35.7C recorded in Surrey, beating previous record of 35.6C, while France records hottest day nationally
A heat-related power outage left around 68,000 homes without electricity in western France as record-breaking heat sweeps Europe.
Increased extreme weather tied to human-caused climate change leads the UN climate agency to say the next five years should shatter more heat records.
French Prime Minister Sébastien Lecornu said 40 people who died by drowning since last Thursday were mainly young people.
Several European countries issued red weather alerts as a fresh bout of extreme heat pushed temperatures beyond 40 degrees Celsius (104 degrees Fahrenheit).
Rail services, schools and sports events hit, with deaths of three elderly people in France partly blamed on intense heat
France, like much of the rest of Europe, is in the grips of a severe heat wave as summer begins this week, leading to canceled trains, concerts and sports events.