@Founderflower I agree with you.
The amount of people saying, "How do people in hot countries survive?" shows they don't really understand why heat affects different places differently.
The weather warning isn't just because it's hot. A "feels like" temperature of over 40°C means the heat is severe enough to affect people's health, public services and even transport and infrastructure.
The biggest factor people overlook is humidity.
Right now, much of the UK is sitting at around 70% humidity. That's relatively high, and it makes it much harder for your body to cool itself down because sweat can't evaporate as efficiently.
Compare that to many hot and dry parts of the world, where humidity can be closer to 20%. In those conditions, sweat evaporates much more quickly, helping your body regulate its temperature. The air temperature might be the same, but the experience can be completely different.
That's why a 35°C day in the UK can feel far more uncomfortable than people expect. It isn't just the temperature that matters, it's how much moisture is in the air.
Many hotter countries are also built for heat. Homes often have better ventilation, tiled floors, shutters, ceiling fans and air conditioning. People are used to living and working in those conditions.
The UK is built for the opposite. Our homes are designed to keep heat in during winter. Once the heat gets into the house, it can stay there well into the night, making it difficult to cool down or sleep. It's not uncommon for indoor temperatures to remain close to 30°C long after the sun has gone down.
People also forget how long our summer days are. We're getting 16 hours or more of daylight, meaning buildings, roads and trains are absorbing heat for much longer.
And this isn't just about being uncomfortable. Extreme heat puts extra strain on the body. Your heart has to work harder, dehydration becomes a bigger risk, and heat exhaustion or heatstroke can happen surprisingly quickly. Sit on a packed Underground train with temperatures pushing 40°C and you'll soon realise this isn't just people moaning about the weather.
Heatwaves in the UK have been linked to thousands of excess deaths in previous years. That's why these warnings exist.
That's my two pence.