Scotland has seen high temperatures Arch White/Alamy Live News

Why are we seeing record heat across the northern hemisphere? Because the planet is getting hotter. And we ain’t seen nothing yet – it’s going to get a lot hotter still.

Scotland hit 33.2°C on 28 June, for instance, passing the previous record of 32.9°C set in August 2003 – though the Met Office says this reading may actually be due to heat from the engine of a nearby vehicle. And in Oman on 26 June, the temperature never dropped below 42.6°C, even at night. That’s …