But when severe drought and extreme heat collide, as they have this year, states like California that rely heavily on hydropower can be forced to buy extra power to meet demand, which tends to spike when temperatures soar.
Photo by Justin Sullivan/Getty Images
Alex Fox is a freelance science journalist based in California. He has written for the New York Times, National Geographic, Science, Nature and other outlets. You can find him at Alexfoxscience.com.
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