With school over and summer beginning, Fairfax County officials are offering tips on how to beat the heat:

* On hot days, drink plenty of water, avoid caffeine, stay indoors as much as possible, avoid strenuous physical activities during the hottest part of the day, eat light meals, wear light-colored clothing and wear sunscreen.

* Do not leave children or pets alone in a car, not even for a few minutes, as the temperature in a car on an 85-degree day can reach 102 degrees in just 10 minutes.

* The county Area Agency on Aging is giving away fans to low-income senior citizens who do not have air conditioning. The program runs until Sept. 30. For more information, call 703-324-7694 or send an e-mail to kim.karlinchak@fairfaxcounty.gov.

* The county Park Authority is offering a variety of water activities. For more information, visit www.fairfaxcounty.gov/parks/recenter.htm or check www.fairfaxcounty.gov/parks/rec/classes/index.htm for a class schedule.

* The county library system is offering reading programs for children and adults. For more information, call 703-324-3100 or visit www.fairfaxcounty.gov/library.

* The county Department of Family Services has a "Guide to Summer Fun and Safety," an 18-page booklet of tips and activities. The guide can be picked up at the county's recreation centers or libraries or by calling 703-324-7400.

Residents are advised to drink plenty of water and to avoid leaving children or pets in cars on hot days.