Excessive Heat Warning

The Napa County Office of Emergency Services-National Weather Service have issued an excessive heat warning for Saturday and Sunday, July 15 and 16.

The weather in Napa Valley will be extremely warm, starting Friday afternoon and getting hotter through the weekend. 

Strenuous outdoor activities are not recommended. If outdoor activity is unavoidable, be mindful of the symptoms of heat related illness.

Places to Cool Down

Napa County libraries and the South Napa Day Center on 100 Hartle Court (see hours below) serve as places for the public to cool down.

Library Hours this Weekend:

  • Napa Library (580 Coombs Street, Napa): Saturday, 7/15 from 10 am - 6 pm and Sunday, 7/16 from 1-5 pm
  • American Canyon Library (300 Crawford Way, American Canyon): Saturday, 7/15 from 10 am - 6 pm
  • Calistoga Library (1108 Myrtle Street Calistoga): Saturday, 7/15 from 10 am - 6 pm
  • Yountville Library (6516 Washington Street, Yountville): Saturday, 7/15 from 9 am - 5 pm

South Napa Day Center Hours this Weekend:

  • Saturday, 7/15 from 8:30 am - 4:30 pm
  • Sunday, 7/16 from 8:30 am - 3:30 pm

Vulnerable populations to extreme heat include young children, older adults, people with chronic diseases, those who are pregnant, unhoused individuals, and outdoor workers, all of whom are more sensitive to such temperatures. Being aware of the extreme heat symptoms can help prevent the dangers of heat exhaustion and heat stroke. Warning signs of heat-related illnesses vary, and may include heavy sweating, muscle cramps, weakness, headache, nausea or vomiting, paleness, tiredness or dizziness.

Cooling Centers

  • Calistoga High School: Saturday and Sunday, 7/15 and 7/16 from 12-8 pm. 

Be prepared - Here are some heat safety tips:

  • Drink lots of water; don’t wait until you are thirsty
  • Stay in an area with AC when possible (if don’t have access, go to cooling centers, public spaces)
  • When outdoors, wear sunscreen and a hat
  • Plan outdoor activities early before 10 am and in the evenings
  • When outside, take lots of breaks in the shade and drink lots of water
  • Know the warning signs of heat-related illness (see list above)
  • If symptoms persist or worsen, seek medical attention

For more info on the symptoms and what to do if you or a loved one shows signs of having a heat-related illness, visit the Centers for Disease Control and Prevention (CDC) Extreme Heat site, the Napa County Extreme Temperatures web page, and the Napa County Public Health Extreme Heat page.