More than 300 people died last year from heat-related complications. Data collected over the past 50 years shows the average temperature in Phoenix has increased 3.6 degrees Fahrenheit.

On top of that, there are more days per year when the temperature climbs above 110 degrees in the Valley of the Sun. And the night temperatures have jumped 5.5 degrees, which means it's not cooling off when the sun goes down.

How does this extreme heat affect us? In this episode of Valley 101, we hear from medical professionals, social service workers and city officials about how metro Phoenix is battling high temperatures. 

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