Articles on Humidity

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A record-tying heat wave helped spread a wildfire in Northern California’s Shasta and Trinity counties in July 2018. Terray Sylvester/Getty Images

How heat waves increase wildfire risk

Heat waves do more than dry out vegetation that can easily burn. They also play a role in lightning strikes, particularly dry lightning.
Evaporating water is essential to helping your body cool down. Imgorthand/E+ via Getty Images

Why is water wet?

You can feel wet when you can see water and when you can’t see water. You can also feel dry even when there’s a lot of water vapor in the air – like during a fire.
Is it better to cool your house all day, or adjust the A/C setting on your way out the door? Westend61 via Getty Images

Does turning the air conditioning off when you’re not home actually save energy? Three engineers run the numbers

Energy modeling software provides insight into whether letting your A/C relax while you’re gone all day will save you energy – and money.

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