Any news source that reports "record-breaking temperatures" is, deliberately or not, making these dangerously increasing temperatures sound like a good thing.
No, record-breaking means it broke a record. If it was used almost exclusively for positive things, you might have a point, but it is routinely used for negative things as well. For example, "storm" is the third most related topic based on Google trends.[1]
1: https://trends.google.com/trends/explore?q=record-breaking&g...