Presenter: This is London's latest hot spot. In the middle of the city's bustling heart, a bizarre beam of light radiates onto the street: powerful, dazzling and searingly hot. The cause of this phenomenon? This 37-storey tower. Once known as the Walkie-Talkie, it's been renamed as the Walkie-Scorchie! The half-built building's curved construction has had an unfortunate effect.
Reporter: As we look up, you can see that it's curved. And so, that's a vast area up there and it's collecting a lot of solar energy. Now, if that was to go out in all directions, it wouldn't really matter. But it's focusing down onto a point and it's focusing down here. So all that solar energy is getting pushed down here and the temperatures down here are getting really, really high.
Presenter: So high, it managed to record a temperature of an astonishing 92.6 degrees Celsius.
Presenter: Well, the sun has started to come out and is already hitting the building behind me. And already you can feel quite an intense heat here.
Presenter: Anything in the direct glare of the reflection can literally go up in smoke. It damaged this car parked nearby. It's caused carpets to smoulder, tiles to smash. It's so hot, you can even fry an egg and singe your hair trying.
Child: Ow! It's hot!
Woman 1: Just as you march through, you really feel the heat. It's quite intense.
Man 1: It's worse as you're coming through.
Woman 2: You'd get a good tan!
Woman 3: Yeah, it is quite hot here, yes.
Presenter: The designers say the problem is the current elevation of the sun. Over the next two to three weeks, weather permitting, it will shine directly onto the building. While they say they're working on the problem, the worst of it lasts for just two hours and it's during one of the busiest times in the day: lunchtime. It's certainly too much for Londoners used to murkier climes. Best to keep calm and keep covered.