Hottest city in US saw record 645 deaths related to high temperatures in 2023

Number of heat-related deaths in Phoenix, Arizona was more than 50% higher than 2022, which officials say can be prevented'

Public health officials in Arizona's most populous county on Wednesday reported they confirmed a staggering 645 heat-associated deaths last year - more than 50% higher than 2022 and another consecutive annual record in arid metro Phoenix.

The numbers in the preliminary report by the Maricopa county department of public health alarmed officials in America's hottest big metro, raising concerns about how to better protect vulnerable groups such as homeless people and older adults from the blistering summer heat.