Heck, that's horrendous!
The aircrews dumping onto the fire areas must feel like they're p*ss*ng into a furnace.
Looks like the heat wave the 'States is having is due to the jet stream moving south, with a meandering track, rather than it's normal curve to the east. It's south of the UK at the moment, with no foreseeable movement, and would normally be to the north, which is causing excessively wet weather in the UK, and the opposite in the USA.