Heat is the leading cause of climate-related deaths in the country, but knowing how deadly it is? That’s not as clear. 

The Centers for Disease Control counted roughly 2,300 heat-related deaths last year, with more than three-fourths of them from six states that included California. A study from Texas A&M, however, projects the actual number could be four times greater, with approximately 11,000 Americans dying from extreme heat last year. 

A new pilot program in California is in the…