First heat warning issued for 2023Whitby, Ontario - Environment and Climate Change Canada has issued a heat warning for the south Durham Region area for June 1 and 2. While extreme heat can put everyone at risk, health risks are greatest for infants and young children, people who are age 60 or older, live alone, take certain medications, lack secure housing, have an existing health condition, have limited resources, have limited physical mobility or who work or exercise outside. ca/heat, or contact Durham Health Connection Line at 905-668-2020 or 1-800-841-2729