RELATED: Dangerous heat in store for the Bay Area
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"It was the only responsible choice, putting the care and health of her employees and guests first," said Amy Hoopes, President of the Livermore Valley wine growers Association.
The 6th annual Front Porch Festival at Wente Vineyards is also cancelled on Saturday because of dangerous heat.
VIDEO: Your AccuWeather forecast
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Ticket sales for both events will be refunded.
Most schools in the tri-valley are canceling outdoor activities Friday.
Novato Schools are sending students home early on a minimum day schedule.
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