The UK Met Office has issued a red weather warning for Wednesday and Thursday. The weather is very hot and humid in many parts of the United Kingdom. In six regions in England, officials say the heat is dangerous. Even healthy people can get sick from this heat. In some places, the temperature will be 37C or even 40C.
This hot weather is happening because of El Niño. El Niño is a natural event in the Pacific Ocean. It happens when the winds in the ocean change direction. Scientists say there is a 63% chance that this El Niño will be very strong. A strong El Niño can cause more heatwaves, heavy rain, and droughts around the world.
The heat is dangerous because of the high humidity. When it is hot and humid, it is difficult for the human body to stay cool. The sun also sends strong UV radiation to the Earth. This radiation can damage your skin and cause cancer. You should be careful even when it is cloudy, because UV rays can go through thin clouds.
The red weather warning covers areas like London and parts of Wales. This heat shows how global changes affect local weather. The weather in the UK is a result of changes in the Pacific Ocean. Scientists will continue to watch the ocean and the winds to prepare for more extreme weather in the future.