ALT Moderate Heat Risk. Saturday-Sunday, August 5-6, 2023. What this means: This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Stay in a cool place during the heat of the day. Impacts: moderate risk for members of heat-sensitive groups, especially those without effective cooling and/or adequate hydration. Map on the right shows moderate heat risk for the Sacramento and northern San Joaquin Valleys with some areas in the foothills.

ALT Dangerous Heat. Excessive Heat Watch in effect from 11 AM Friday July 14th to 8 PM Monday July 17th, 2023. Map shows area of concern: The Valley and surrounding foothill areas of Northern California. Temperatures: Valley, foothills, & moutains: Highs 98-113°, Lows: upper 60s - low 80s. Precautions: High risk of heat stress or illness to people or animals, stay hydrated, avoid being outdoors in the sun between 10 AM and 6 PM. If you have access to air conditioning, use it, fans may not be adequate. Stay in a cool place especially during the heat of the day. Area waterways will continue to run cold and fast, creating dangerous conditions for those seeking relief from the heat.

ALT Dangerous Heat Risk Saturday July 15 - Sunday July 16, 2022. A map of Northern California shows widespread major Heat Risk for the Northern Sacramento Valley and foothills. Major Heat Risk: High risk of heat-related illness for much of the population without protective action. What this means: Heat like this happens a few times a year; the majority of the population is at risk; limited overnight cooling; take extra precautions to stay cool and hydrated.