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The Heat Waves: A Primer
The summer of 2022 is shaping up to be a very warm one. The heat wave is expected to intensify in the next few months, with above-normal temperatures likely across the lower 48 states.
- Heat waves begin when high pressure in the atmosphere moves in and pushes warm air toward the ground.
- The air warms up further as it is compressed, and we begin to feel a lot hotter.
- A heat wave parks itself over an area for several days or longer.
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Heat Domes
As the ground warms, it loses moisture, which makes it easier to heat even more.
In the drought-ridden West, there is often plenty of heat for the high-pressure system to trap.
The trapped heat continues to warm, the system acts like a lid on a pot - earning the name "heat dome"
Last summer in the West, high pressure trapped heat led to triple-digit temperatures that killed hundreds.
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Hotter Than Normal
We have long known that the world has warmed by more than 1 degree Celsius (about 1.8 degrees Fahrenheit) since 1900, and that the pace of warming has accelerated in recent decades.
Staying Safe
- Give yourself time to acclimate
- Increase the amount of time you spend outdoors gradually, if you can, by about 20 percent
- Know the signs of heat exhaustion and heatstroke
- Hydrate and drink water
- Don’t push yourself past comfort
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Power Outages
To help reduce demand, consider raising the thermostat by a few degrees and closing window shades and blinds.
Avoid using large appliances like ovens, washing machines and dryers during the hottest part of the day, and turn off all lights and electronic devices not in use.
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