As Phoenix swelters, the nights are even worse than the boiling days

Temperature topped 110F on four consecutive days and has not fallen below 80F at night-time for the past week in the Arizona city, breaking several records

After a record-breaking daytime temperature in Phoenix last Friday, the onset of night offered little relief from the sweltering heat. As the clock struck midnight it was still a staggering 100F (38C) outside and just a few degrees cooler inside 60-year-old Sarepta Jackson's home.

Jackson lay naked and as still as possible on the bed next to an old portable air conditioning unit in the bedroom window, but couldn't relax or get comfortable. She eventually got up around 2am to make rice and beans for the following day because the air conditioner and electrical appliances won't run together, so it's too hot to cook during the day.