Scientists warn tens of millions of Americans will be affected by extreme weather linked to climate change
Kenza Bryan in London and Stephanie Findlay in Dallas
The southern US faces temperatures as high as 46C this week as forecasters warn of “dangerous record-breaking” heat for tens of millions of people.
A high-pressure system known as a heat dome is sitting over the Southwest and south-central parts of the country, acting like a lid that prevents heat from escaping into the atmosphere.
