Arin Yoon for Insider
This article is part of Insider's "The True Cost of Extreme Weather" project. Read more here.
When Lois Nigrin flew to Arizona with her husband, Joe, to celebrate the 30th anniversary of their first date, she never imagined she might not make it home.
But one miscalculation on a hot day would soon leave her in a coma. Her legs, buttocks, back, and head would have third-degree burns. Her organs would start to fail. Her kids would fly in to say their goodbyes.
"I don't think I had a true understanding of what heatstroke was," Lois Nigrin told Insider. "I had no idea that it could kill you."