There’s a heat advisory in effect for the Northeastern Mendocino Interior, Southeastern Mendocino Interior, Northern Lake, and Southern Lake county through 9 pm on Sunday. Temperatures of 108 and an intense uv will make for dangerous heat-related conditions. Know the symptoms of heat illness, if you must work outside do so in the early morning or evening. If you are sensitive, exercise extreme caution. Remember, no children, elderly or pets in the car unattended.