STORY: "We've got a difficult 48 hours coming," Kit Malthouse, a minister in charge of government coordination, told the BBC.
Malthouse said the government was prepared for the extreme weather and would seek to learn lessons from it.
He added that the UK also had to lead the world in combating climate change.
Britain's government triggered a "national emergency" alert as temperatures were forecast to surpass the 102F recorded in the Cambridge University Botanic Garden in 2019 on Monday and Tuesday (July 19).
Much of Europe is baking in a heatwave that has pushed temperatures into the mid-40s Celsius - or over 110 Fahrenheit - in some regions.