If you haven’t planned a Labor Day trip outside of the valley, you’re going to be stuck in the high heat.

Temperatures are forecast about 10 to 18 degrees above normal this week for the North State through Labor Day weekend, with the highest expected Friday and Saturday.

The “normal” is based on 30 years of data, said Brooke Bingaman, meteorologist with the National Weather Service.

Forecast high temperatures include 101 today and 103 Thursday before ratcheting up to 107 Friday and 106 Saturday.

Sunday should go down to 101 degrees.

“It’s a beast of a high-pressure system,” Bingaman said.

The excessive heat has the weather service warning of the following impacts:

– Moderate to high heat risk for sensitive groups.

– Increased heat stress on livestock and pets.

– Increased potential for fire starts due to hot and dry conditions.

The Mid-Valley’s high temperatures at the end of August 2016 were in the low 90s.

The coolest morning temperatures this week will be about 64 degrees today and Thursday.

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