Question: what is the difference between a heat advisory and a heat warning?
Answer: An Excessive Heat Warning may be issued for lower criteria if it is early in the season or during a multi-day heat wave. ... A Heat Advisory is issued when the heat index value is expected to reach 105 to 109 degrees (east of the Blue Ridge) or 100 to 104 degrees (west of the Blue Ridge) within the next 12 to 24 hours.