On the global warming heatwave that killed about 70,000 people in Europe in 2003  "Under business-as-usual carbon emissions scenarios, one-day heat waves that now happen once every 20 years will happen every year...In London, the likelihood of a summer as scorching as 2003 has shifted from a 1-in-10-year event to a 1-in-3-year event. In Paris, such soaring temperatures had moved from a 1-in-92-year event to a 1-in-30-year event."

https://insideclimatenews.org/news/07072016/climate-change-blame-deadliness-2003-heat-wave-new-study-paris-london