The U.S. is currently enduring an extreme heatwave, with over 100 million Americans told to stay indoors where possible and avoid the blazing sun
St Louis, Memphis, Minneapolis and Tulsa are all under dire heat warnings, with temperatures reaching 38 degrees coupled with high humidity.
The National Weather Service says 107 million Americans will be affected by heat advisories and warnings this week alone.
Beginning in the west and south-west, the heatwave has now moved east into parts of the Gulf coast and will reach as far as the Great Lakes and the Carolinas.
In Chicago, officials have started alerting residents about relief centres.
Six community buildings will be opened to aid those who do not have access to suitable air conditioning.
The city significantly ramped up its heatwave protocols after more than 700 people died in the 1995 heatwave.
