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Excessive Heat Watch Friday, Saturday and Sunday

Posted at 12:35 p.m.

The National Weather Service has issued three separate Excessive Heat Watches for Friday, Saturday and Sunday. All three begin in the morning each day and expire in the evening.

An Excessive Heat Watch means that a prolonged period of dangerously high temperatures is possible. You should prepare for extreme temperatures and high humidity, which would create a situation in which heat illnesses are expected.

Heat index values could potentially rise to 110 to 115 degrees each day with temperatures in the middle 90s to around 100 degrees and dewpoints in the lower to middle 70s.

Heat Safety Tips

  • Never leave a child or pet alone in a car.
  • Find places with air conditioning. Libraries, shopping malls and community centers can provide a cool place to take a break from the heat. (See Fairfax County’s cooling center information below.)
  • If you’re outside, find shade. Wear a hat wide enough to protect your face.
  • Wear loose, lightweight, light-colored clothing.
  • Drink plenty of fluids to stay hydrated. If you or someone you care for is on a special diet, ask a doctor how best to accommodate it.
  • Do not use electric fans when the temperature outside is more than 95 degrees, as this could increase the risk of heat-related illness. Fans create air flow and a false sense of comfort, but do not reduce body temperature.
  • Avoid high-energy activities.
  • Check yourself, family members, and neighbors for signs of heat-related illness.

Fairfax County Cooling Centers

With these high temperature and heat index, there is an increased risk of heat-related illness for those without air-conditioning or those outdoors for an extended period. During extremely hot days, there is plenty that you can do to stay cool, like go to a movie, stroll through a shopping center or visit one of Fairfax County’s Cooling Centers:

Please check the operating hours to ensure the facility is open before arriving. Remember — resting for just two hours in air conditioning can significantly reduce heat-related illnesses.

Heat Advisory in Effect — Stay Safe and Cool

Posted at 10:30 a.m.

The National Weather Service reports that excessive heat will impact Fairfax County throughout the week and a Heat Advisory is in effect. Heat indices around 105°F – 110°F are possible today and Thursday afternoon and early evening. In addition, dew points are expected to be in the low to middle 70s through Thursday, creating very humid conditions.

Dangerous heat and humidity are likely Friday through Sunday across the entire area. Heat indices of 110°F to 115°F degrees are possible during the afternoon and evening hours each day, and heat indices may hold in the 80s and 90s at night.

The Heat Index is a measure of how hot it really feels when relative humidity is factored in with the actual air temperature. Learn more about the heat index from the National Weather Service.

If the prolonged heat and humidity is realized, it will become a significant threat to anyone exposed to the heat for an extended period of time.

heat safety

The National Weather Service has issued a Heat Advisory in effect from 11 a.m. this morning until 8 p.m. this evening. A Heat Advisory means that a period of high temperatures is expected. The combination of high temperatures and high humidity will create a situation in which heat illnesses are possible.

The heat and humidity may cause heat stress during outdoor exertion or extended exposure.

Take extra precautions if you work or spend time outside — take frequent breaks and be sure to stay hydrated. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water.

To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency – call or text 9-1-1.

Fairfax County Cooling Centers

With these high temperature and heat index, there is an increased risk of heat-related illness for those without air-conditioning or those outdoors for an extended period. During extremely hot days, there is plenty that you can do to stay cool, like go to a movie, stroll through a shopping center or visit one of Fairfax County’s Cooling Centers (see map below):

Please check the operating hours to ensure the facility is open before arriving. Remember — resting for just two hours in air conditioning can significantly reduce heat-related illnesses.

Kids and Pets in Cars

Please remember that it is never safe to leave a child, adult or a pet alone in a car, even in the winter. So far in 2019, according to weather.gov, nine toddlers have died in hot cars!

The sun’s shortwave radiation heats objects that it strikes. For example, a dark dashboard or seat can easily reach temperatures in the range of 180 to over 200°F. These objects (e.g., dashboard, steering wheel, child seat) heat the adjacent air by conduction and convection and also give off longwave radiation that is very efficient at warming the air trapped inside a vehicle.

Studies have shown that the temperature inside a parked vehicle can rapidly rise to a dangerous level for children, pets and even adults. Leaving the windows slightly open does not significantly decrease the heating rate. The younger the child the more severe the effects because their bodies have not developed the ability to efficiently regulate its internal temperature.

Heat Safety Tips

  • Find places with air conditioning. Libraries, shopping malls and community centers can provide a cool place to take a break from the heat. (See Fairfax County’s cooling center information above.)
  • If you’re outside, find shade. Wear a hat wide enough to protect your face.
  • Wear loose, lightweight, light-colored clothing.
  • Drink plenty of fluids to stay hydrated. If you or someone you care for is on a special diet, ask a doctor how best to accommodate it.
  • Do not use electric fans when the temperature outside is more than 95 degrees, as this could increase the risk of heat-related illness. Fans create air flow and a false sense of comfort, but do not reduce body temperature.
  • Avoid high-energy activities.
  • Check yourself, family members, and neighbors for signs of heat-related illness.

Weather Forecast

heat advisory

  • Wednesday: Partly sunny, with a high near 95 and a heat index value as high as 100. Chance of precipitation is 40%, with a chance of showers and thunderstorms after 2 p.m.
  • Thursday: Mostly cloudy, with a high near 90. A chance of showers and thunderstorms. Chance of precipitation is 50%.
  • Friday: Sunny and hot, with a high near 97.
  • Saturday: Mostly sunny and hot, with a high near 98.

Find a detailed forecast here.


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Summer Heat is Still Here — Heat Advisory in Effect

Posted at 12:30 p.m.

Summer’s heat is still here and with the National Weather Service issuing a heat advisory until 8 p.m. tonight, you’re encouraged to take precautions if you have to be outside today.

A heat advisory means that a period of high temperatures is expected. The combination of high temperatures and high humidity will create a situation in which heat illnesses are possible.

Heat index values will be around 105 degrees due to temperatures in the middle to upper 90s, and dewpoints in the lower to middle 70s. This heat and humidity may cause heat stress during outdoor exertion or extended exposure.

  • Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening.
  • Know the signs and symptoms of heat exhaustion and heat stroke.
  • Wear light weight and loose fitting clothing when possible and drink plenty of water.
  • To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments.

Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency – call 9-1-1.

And please remember … It is never safe to leave a toddler, disabled person or pet in a car.

heat safety

Pets and Hot Weather

Posted at 1 p.m.

June is Pet Preparedness Month. And it’s also the beginning of summer — officially beginning today, June 21 — and that means hot weather.

Please remember: Never leave pets (or children) in the car! Temperatures rise quickly even with the windows down and it can be deadly for your pet.

  • Be sure your pets have access to plenty of water, especially when it’s hot.
  • Make sure your pet has plenty of shady places to go when outdoors.
  • Test sidewalks with your hand. If it’s too hot for your hand, it’s probably too hot for your pet.
  • Avoid exercising with your pet outside on extremely hot days.

Pet Preparedness

Since pets cannot plan for themselves, it is important to make a plan for your pet’s safety.

  • Include your pets in your emergency plans.
  • Build a separate emergency kit for your pets. View what items should go in it: www.ready.gov/pets.
  • Make sure and keep digital records and/or pictures to identify your pet after a disaster in case you become separated.
  • Include the number of an out of town relative on your pet’s ID tag.
  • Think about “microchipping” your pet. These permanent implants help locate your pet following a disaster.
  • Create a list of places that accept pets if an emergency happens.

Get more pet preparedness tips and information from Ready.gov.

pet preparedness

Video: Heat Advisory Issued Today and Heat Safety Tips

Posted at 1:15 p.m.

The National Weather Service has issued a heat advisory today, in effect until 8 p.m. tonight.

Heat index values will be up to 107 degrees with maximum temperatures in the mid to upper 90s. The heat and humidity may cause heat stress during outdoor exertion or extended exposure.

Staff from our Office of Emergency Management, Health Department and Office to Prevent and End Homelessness joined us to discuss today’s heat advisory, what you can do to stay cool and safe in the summer heat, as well as what you should be aware of and can do to assist our vulnerable population.

For more information on extreme heat, visit www.fairfaxcounty.gov/emergency/hazards/extreme-heat.htm. For the current weather forecast, visit www.fairfaxcounty.gov/emergency/weather-forecast.htm.