The National Weather Service has issued an excessive heat warning for Loudoun County until 9 p.m. tonight. An excessive heat warning means that high temperatures are expected to be around 100 degrees, but it will feel at times like it’s between 110 and 115 degrees. The worst of the heat is expected Friday afternoon.

An excessive heat watch remains in effect from Saturday morning, June 30, 2012, through Saturday evening. Temperatures on Saturday afternoon are expected to reach 100 degrees, and feel like 110 degrees.

The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Loudoun County officials remind residents to take these steps to prevent heat-related illnesses, injuries and deaths during this period of excessive heat:

• Stay in air-conditioned rooms
• Drink plenty of fluids
• Replace salt and minerals
• Wear appropriate clothing and sunscreen
• Schedule outdoor activities carefully
• Pace yourself
• Monitor people at high risk
• Do not leave children or pets in cars
• Check on relatives and neighbors
• Use common sense

The public is reminded that air-conditioned facilities operated by Loudoun County, such as community centers and libraries, are available during normal business hours as places where people can seek refuge from the excessive heat. In Ashburn, that includes the Ashburn Library.

More tips for staying cool during hot weather can be found on the county’s website.