"Triple-Digit Heatwave Expected for Northern California Fourth of July Weekend"

Northern California is bracing for its first triple-digit heatwave of the season, with temperatures expected to reach 101 to 106 degrees on Friday and continue throughout the Fourth of July weekend. The Sacramento region has declared a Spare the Air Day due to unhealthy air quality, and residents are advised to clean their air conditioning filters for better efficiency. The Sierra region, however, is expected to have a pleasant day with no thunderstorms. Saturday is predicted to be the peak day of the heatwave, with temperatures reaching 105 degrees or higher in some areas. Temperatures will gradually decrease starting Monday, with mid-90s expected for the Fourth of July.