The following gallery from NOAA and the NWS offers tips and information

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In some locations the index may reach 105 degrees for a few hours, the NWS said.
The National Oceanic and Atmospheric Administration recommends the following:
Slow down: reduce, eliminate or reschedule strenuous activities until the coolest time of the day. Children, seniors and anyone with health problems should stay in the coolest available place, not necessarily indoors.
Dress for summer. Wear lightweight, loose fitting, light-colored clothing to reflect heat and sunlight.
Eat light, cool, easy-to-digest foods such as fruit or salads. If you pack food, put it in a cooler or carry an ice pack. Don't leave it sitting in the sun. Meats and dairy products can spoil quickly in hot weather.
Drink plenty of water (not very cold), non-alcoholic and decaffeinated fluids, even if you don't feel thirsty. If you are on a fluid restrictive diet or have a problem with fluid retention, consult a physician before increasing consumption of fluids.
Use air conditioners or spend time in air-conditioned locations such as malls and libraries.
Use portable electric fans to exhaust hot air from rooms or draw in cooler air.
Do not direct the flow of portable electric fans toward yourself when room temperature is hotter than 90 degrees. The dry blowing air will dehydrate you faster, endangering your health.
Minimize direct exposure to the sun. Sunburn reduces your body's ability to dissipate heat.
Take a cool bath or shower.
Do not take salt tablets unless specified by a physician.
Check on older, sick, or frail people who may need help responding to the heat. Each year, dozens of children and untold numbers of pets left in parked vehicles die from hyperthermia. Keep your children, disabled adults, and pets safe during tumultuous heat waves.
Don't leave valuable electronic equipment, such as cell phones and gps units, sitting in hot cars.
Make sure rooms are well vented if you are using volatile chemicals.
Dominion Power said in a statement “It’s always a good idea to use energy wisely, however—especially during times of extreme temperatures—to minimize the impact on your usage and electric bill.”
The company encourages customers to do the following:
Raise your thermostat a few degrees if possible, (76-78 degrees is the ideal) taking into account your comfort level and any medical conditions that exists for household members. If you are away from home for more than eight hours, raise the thermostat setting and you can save for each degree of setback.
Keep shades closed when the air conditioner is on. Sunny windows can add heat to your home and can make your air conditioner work two to three times harder.
Check and clean air filters—it allows the system to run more efficiently. The top cause of AC breakdown is dirty air filters.
Install ceiling fans and make sure they are blowing down counterclockwise. Moving air over the body provides a cooling effect. Most fans have a switch to change the fan direction. Keep fans off when the room is unoccupied.
Postpone activities that require hot water and large energy use – such as washing dishes or clothes – to early morning or late evening. This will keep from adding more heat and humidity to the home.
Use cold water to wash dishes and clothes. This will save on water heating costs and keep temps in your home lower.
Unplug equipment or appliances when not in use. Electric chargers, televisions and audio/video equipment use electricity and produce heat even when they are not in use. Running an older refrigerator can use up to three times the energy of a modern one.