With the title “Sunny Southern California,” hot temperatures are common, especially during the summer months.

What to Know

  • Heat-Related IllnessesSymptoms and guidance from the CDC.
  • Excessive Heat WARNING-Issued by the National Weather Service within 12 hours of when the maximum heat index temperature is expected to be 105 ° or higher for at least 2 days and nighttime air temperatures will not drop below 75 ° F.
  • Excessive Heat WATCH-Issued when conditions are favorable for an excessive heat event in the next 24 to 72 hours.
  • Heat Advisory- Issued within 12 hours of the onset of extremely dangerous heat conditions, generally when heat index temperature is expected to be 100 ° F or higher for at least 2 days and nighttime air temperature will not drop below 75 ° F.
  • Excessive Heat Outlook- Issued when a potential exists for an excessive heat event in the next 3-7 days.

What to Do

  • In the event of extreme heat, wear lightweight, light-colored, loose-fitting clothing.
  • Avoid over-exerting yourself outdoors. Reduce, eliminate, or reschedule strenuous activities until the coolest time of the day.
  • Spend time in air-conditioned spaces. Consider going to a cool building if you do not have air-conditioning (example- common areas, dining areas, libraries).

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