SAN JOSE, Calif. (KGO) -- It was another soggy day across the Bay Area.
The rain caused traffic problems all around. The CHP had to slow down drivers on Highway 101 because of a wreck in Petaluma.San Jose, like most of the Bay Area, had a tough go with the heavy rain.
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The heavy rain made it tough on anyone who couldn't stay inside. Grocery shoppers got drenched as they dashed across the parking lot.
The Guadalupe River was raging. It serves as a drain for the runoff, channeling it to the bay, taking with it empty bottles probably discarded upstream at homeless encampments.
Just above the river, volunteers and staff from the American Cancer Society of Silicon Valley were setting up tents and preparing for 15,000 walkers to show up for tomorrow's 5K Making Strides event.
RELATED: Weather forecast for Saturday
Event manager Stefany Wilson has been watching the weather forecast closely.
"I have been watching it since 15 days out, and it keeps flip-flopping back and forth, so now we're here, and we're just ready to rock and roll. A little rain's not going to stop us," Wilson said.
The tents will help but the motivation to support cancer patients transcends rain.
"I don't think the weather will impact the turnout at all," said Joana Nouraga, a Cancer Society volunteer. "This is an amazing cause. I'm a breast cancer survivor myself, and survivors as a whole and their supporters will be out here tomorrow at this event, rain or shine."
Even as the sun began to break through as the rain eased up, drivers discovered flooded roads. One full lane of Senter Road across from San Jose's Kelley Park was impassable. Despite a warning sign, some big rigs and smaller vehicles plowed through the small lake anyway.
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At the Friday farmers' market, one vendor from San Benito County said the rain was impacting shopper turnout, but there's a bright side.
"Particularly on the farm, though, we do like the rain. We're getting ready for winter. It doesn't seem to hurt the winter crops, but it does accelerate the season a lot faster," said Alex Mendoza with Specialty Produce.
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Heavy rain drenches South Bay