"highest temperature on record"... so far.

There are still ~4 months till peak El Niño, and then some months to spread effects.

> ... so far That's what "on record" means

Is not the same a record that may be broken in the next 100 years than one that will be broken most days till end of year. One is an event, the other is a running process with no clear end, besides that won’t be the current point.