You are correct that the article is shallow in content and more of fear mongering. But at the same time, it is true that the heat is getting worse with each pas

You are correct that the article is shallow in content and more of fear mongering. But at the same time, it is true that the heat is getting worse with each passing year (in the last 4-5 years at least, you can check the temperature data), so it is very likely that heat related deaths and ailments are increasing. So the article is trying to highlight an important issue, although not in the best way, and in fact might even be harmful because a single wrong fact can ruin the credibility of the entire article.