The National Weather Service has issued a heat advisory for Woodbridge on Wednesday.

Prince William County and Northern Virginia can expect heat index values of around 105 degrees Wednesday. The advisory is set for 11 a.m. to 9 p.m. Wednesday. 

What's a heat advisory?

"A heat advisory means that a period of hot temperatures is expected," said an NWS alert. "The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check on relatives and neighbors."

Do you know the signs of heat exhaustion?

They include:

• Complaints of light headedness/dizziness
• Altered mental status/ “clouded judgment”
• Rapid pulse
• Extreme or limited amounts of sweating

NWS offers the following tips for staying cool:

• Drink plenty of fluids
• Stay out of the sun
• Stay in an air-conditioned room
• Reschedule strenuous activities to early morning or late evening
• Wear light-weight and loose fitting clothing when possible
• If you must work outdoors, schedule frequent rest breaks in shaded or air-conditioned areas.

Where to Stay Cool in Town

• Potomac Community Library, or any of the Prince William County libraries, which open at 10 a.m. 
• Grab a cool beverage at a coffee shop or restaurant in town.
• Go bowling at AMF lanes in Dale City. 
• Catch a movie at AMC Potomac Mills. Tickets are available online.