Arizona's scorching summer kills hundreds and threatens way of life for many more

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How bad are things? Has there been like a sea change in the risk here?
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DR. JOHN BALBUS: The really disturbingly high death tolls that we were talking about in
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places like Maricopa County are saying that the outdoor spaces are becoming uninhabitable now
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in places like the Desert Southwest, where the temperatures are getting so high and the heat
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waves are lasting so long and those minimum temperatures are so high, that people who are
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suffering in our society, suffering from poverty, suffering from mental illness are at highest risk.
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STEPHANIE SY: Another high-risk group, outdoor workers. Filiberto Lares' job
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involves ferrying food to planes around the tarmac of Phoenix's main airport,
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where temperatures can run three to five degrees hotter than surrounding areas.
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His truck doesn't have air conditioning.
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FILIBERTO LARES, Driver, LSG Sky Chefs: We have to stay there in our cabin. I think that, when
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you go to the shopping, when you go to the parking, how is your car, how hot it is.
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STEPHANIE SY: He's done this job for 11 years,
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but now, at 56, he's working mostly at night to avoid the worst of the heat.