Heat Watch/Warning

  • Excessive Heat Watch:
    The National Weather Service issues and Excessive Heat Watch within 24 to 48 hours of the onset of the following conditions: heat index of at least 105°F for more than 3 hours per day for 2 consecutive days, or a heat index of at least 115°F for any period of time.
  • Excessive Heat Warning:
    The National Weather Service issues an Excessive Heat Warning within 24 hour of the onset of the following conditions: heat index of at least 105°F for more than 3 hours per day for 2 consecutive days, or a heat index of more than 115°F for any time period.