The heat intensified over northern California Friday afternoon, and it will get even hotter on Saturday and Sunday. Excessive Heat Warnings are already in effect, and it is important to stay cool and safe during this heatwave. Temperatures rose 5 to 8 degrees this afternoon compared to yesterday afternoon, and hotter weather is still ahead. Tonight will be clear and it won't cool very well after our hot day. Overnight lows will range from the 50s and 60s in the mountains to the 70s and 80s in the valley and foothills. Saturday will be mostly sunny to sunny and even hotter, with highs ranging from the 90s in the mountains to the 100s in the valley and foothills, and many valley locations will range from 108 to 115 degrees.
We won't get a break from the heat on Sunday in northern California, either. Everyone will have similarly very hot and potentially record-breaking highs, only a degree or two either way from where we end up Saturday. Excessive Heat Warnings and Heat Advisories continue for our entire region through Monday night. There will be some minor cooling of our weather as we progress through next week, but even at its coolest next Friday, we will still only cool to where we should be in mid-July. Valley lows will cool from near 80 to the 60s. Valley highs will cool from 110-115 to 95-100.