That's just what the media is reporting on. Actually some other regions are having even more extreme heat waves although it's not everywhere on earth, obviously.

https://csi.climatecentral.org/climate-shift-index?lat=23.56399&lng=-96.67969&zoom=2

https://csi.climatecentral.org/climate-shift-index?lat=-7.71099&lng=-42.42187&mapType=anomalies&zoom=2

The current strong El Niño that is forming is highly predictive of severe heat in many places across the world, although there are some exceptions. So we can expect this to continue, albeit the exact geographic extent will likely shift.

As it turns out, it's called global warming since it is affecting the whole world. Now that heat waves are becoming a large problem in NA and Europe, Western media (being based there) is more likely to cover that. But lots of places have already been experiencing greater storms, floods, etc. due to the increase in global temperatures. And from my own experience in Asia, it's really hot in the summer now, sometimes over 34 degrees (Celsius), far more than just a few years ago!