Extreme heat brought on by climate change could see cardiovascular deaths triple within 50 years, warns a new study. In a scenario where only minimal efforts to reduce emissions were made, heat-influenced cardiovascular deaths - including by stroke and heart attack - could increase by as much as 233 percent over the next 13 to 47 years, scientists predict. The research team behind the study, published in the American Heart Association journal Circulation, warned deaths will be more prevalent among elderly and black populations. Researchers predicting cardiovascular death rates brought on by elevated temperatures warn they could more than double...