 For every 15 minutes of outdoor activity, you should drink about four ounces of water, which is like four big gulps, or drink 16 ounces of water an hour, depending on your activity level. O'Shea also advises people to make use of virtual care programs that connect you with a health care provider 24-7 from home. She notes that UnitedHealthcare plans offer this type of urgent care at no additional cost. For California News Service, I'm Suzanne Potter.