These thermal images capture the struggle of commuters trying to keep cool as the country is hit by recording breaking temperatures.
With highs of up to 39C possible in the capital today, and the hottest July day on record, these pictures show Londoners soldiering to get to work in stifling conditions.
The Cat S61 smartphone uses thermal imaging technology to visualise people's body temperatures, with those travelling in London bearing the brunt of the staggering heat.
Mums can be seen pushing prams boldly down streets with body temperatures at a scorching 35.8C.
Heat emitted from buses hits a whopping 50.8C, trumping even the 45C road-temperatures recorded in Shoreditch, east London.
The London Underground retains its summer “sauna”-style reputation, with passengers stuck sweating inside a 33.4C Victoria Line carriage.
But, surprisingly, the hottest commuter captured was not inside at all.
They were gliding along on an e-scooter from the City to north London, with a body temperature of nearly 40C.
The stunned scooter driver said: “It’s a great way to get around in terms of speed but in my experience you’re really exposed to the elements – it gets very hot in summer and very cold in the winter.
“It feels more comfortable than the tube or a bus but it’s interesting to see that my surface temperature is in fact very high. I definitely feel hot today!”
People who run or jog to work don’t fare much better when heatwaves take over, as one runner in Shoreditch discovered yesterday with a body temperature of over 37C.
Tattoos also make a difference to overall surface temperature.
Images of Shoreditch tattoo artists show higher temperatures on sections of skin that are heavily inked – with the black of the tattoo retaining more heat.
But people are not alone in their battle to cool down, the gallery shows cats and dogs in particular sweltering in the heat.
Dogs at Hampstead Heath could be seen jumping in the cooling ponds to bring their temperatures down, with one registering a high of 48.2C.
Since many pavements have almost reached melting point, animal welfare organisations are urging dog owners to be extra-cautious when walking their pets.
They recommend using the “five-second test” – if it’s too hot to hold your hand on the pavement for five seconds, it’s too hot to walk your dog at that time.
It’s also important to make sure pets have access to fresh water and shade and aren’t left in hot cars or other enclosed spaces for too long.
