A working group of 23 scientists convened by the International Agency for Research on Cancer of the World Health Organization has evaluated the carcinogenicity of coffee, tea, and other hot beverages and has exonerated all of them. On the other hand, the scientists determined that almost any nonalcoholic beverage, when consumed at temperatures above 150° F, may contribute to the risk of esophageal cancer. They even found limited evidence implicating hot water.
http://www.health.harvard.edu/cancer/beverage-temperature-tied-to-cancer-risk
Beverage temperature tied to cancer risk