Peter O'Dowd
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With consecutive days of subfreezing temperatures, homeless shelters say they're short on supplies and their budgets are stretched. Meanwhile, farmers are working to fight freezing temperatures that could affect the size and quality of this year's crops.
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Democrat Kyrsten Sinema, 36, is a former social worker who spent part of her childhood living in an abandoned gas station. To win her district, made up of almost equal parts Republicans, Democrats and independents, she had to focus on voters in the middle.
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The Arizona city already logs more days over 100 degrees than any U.S. city, and climate researchers predict Phoenix will grow hotter still in the coming decades. Planners are taking the projections seriously, and are looking for ways to adapt the city and its residents to a hotter, drier reality.