The National Weather Service has issued an Excessive Heat Warning for San Diego County deserts, starting at 11 a. m. Saturday, 7/1/2023, until Monday, 7/3/2023, at 8 p. m. Dangerously hot conditions with afternoon high temperatures of 112 to 117 degrees expected. The National Weather Service has also issued an Excessive Heat Advisory for San Diego County Mountains effective 11 a. m. Saturday, 7/1/2023, until Monday 7/3/2023 at 8 p. m. Visit the National Weather Service for more information updates and a map. * Extreme heat increases the risk for heat-related illnesses and can affect those working or participating in outdoor activities. * Drink plenty of fluids, stay in an air-conditioned room if one is available, stay out of the sun and check up on relatives and neighbors by telephone, video call or in-person.. * Young children and pets should never be left unattended in vehicles at any time. * Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. * Know the signs and symptoms of emergencies like heat exhaustion and heatstroke, visit Excessive Heat (sandiegocounty. gov) County facilities may be open as Cool Zones. For location information, hours of operation and tips to beat the heat, visit www. coolzones. org