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After heavy rainfall, Maya Sidhu and Sammy Kheirbek, 8, are blocked by a large puddle at the corner of Divisiadero and Post in San Francisco on Monday, October 13, 2025.<\/p>\n
Scott Strazzante\/S.F. Chronicle<\/p>\n
A group of Cal Fire firefighters walk on a dozer line during the Pickett Fire in Calistoga on\u00a0Aug. 21, 2025. The National Weather Service issued a flash flood warning for Napa County\u2019s\u00a0burn scar area on Monday amid heavy rain and debris flow risks.<\/p>\n
Stephen Lam\/S.F. Chronicle<\/p>\n
Flooding is seen on Divisadero Street in San Francisco on Oct. 13, 2025 as a storm drenches the Bay Area.\u00a0<\/p>\n
Becca Neuwirth\/courtesy<\/p>\n
Much of the Bay Area was temporarily under a flood advisory Monday as heavy rainfall drenched the area during the biggest storm in months, with minor flooding reported in San Francisco, flash flooding threatening a recently scorched spot in Napa County and traffic incidents snarling the afternoon commute.\u00a0<\/p>\n
San Francisco residents encountered flooding on various streets as the city was cloaked in gray skies and soaked by downpours, according to multiple city agencies. In the late afternoon, a large puddle collected at\u00a0Divisadero and Post streets, where drivers and even a runner splashed through the water.\u00a0<\/p>\n
Crews with San Francisco Public Works were hustling to clear storm drains as the agency received \u201ca lot of reports of localized flooding due to drains blocked primarily by leaves,\u201d said Rachel Gordon, communications director.\u00a0<\/p>\n
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The San Francisco Department of Emergency Management had received multiple\u00a0reports of flooding\u00a0shortly\u00a0before\u00a05 p.m.,\u00a0according to public relations officer\u00a0Denny Machuca-Grebe. Flooded areas included\u00a0Alemany Boulevard and the intersection of 17th and Folsom streets.\u00a0<\/p>\n
\u201cWe are working closely with our city partners to ensure the calls are routed to the right agency, and the hazard is mitigated,\u201d Machuca-Grebe said. \u201cWe will continue to monitor the storm so disruptions remain minimal.\u201d\u00a0<\/p>\n
The National Weather Service issued a flood advisory for San Francisco and parts of Alameda, Contra Costa, San Mateo and Santa Clara counties that remained in effect until 6:45 p.m., with the agency warning of minor flooding in low-lying and poor drainage areas due to excessive rainfall.\u00a0<\/p>\n
The San Francisco Fire Department had responded to roughly five reports of flooding as of 4:30 p.m., mostly isolated in the Diamond Heights and downtown areas, said Capt. Jonathan Baxter, the agency\u2019s spokesman.\u00a0<\/p>\n
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He said firefighters had responded to reports of flooded streets and buildings on Diamond Street, Laguna Honda Boulevard, Bush Street and Lucky Street in\u00a0the Mission, where they cleared clogged\u00a0drains.<\/p>\n
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Rainwater sprays out of a drain on Stockton Street in San Francisco on Monday, October 13, 2025.<\/p>\n
Scott Strazzante\/S.F. Chronicle<\/p>\n
Baxter said the fire department recommended that residents stay home during the storm, and urged drivers out on roads to avoid entering puddles of water because they could be deeper than they seem.\u00a0<\/p>\n
Elsewhere in the Bay, the storm seemed to wreak havoc on the freeways. The California Highway Patrol incident feed documented dozens of collisions, roadway flooding and other reported\u00a0hazards in Oakland, San Jose, Redwood City and Santa Rosa, including a flood reported on U.S. 101 south of Novato.\u00a0<\/p>\n
A possible tornado touched down around 4:30 p.m. near Pescardero in San Mateo County. The NWS will send a damage survey team to investigate on Tuesday.<\/p>\n
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The weather service also issued a flash flood warning Monday afternoon for the area surrounding the Pickett Fire burn scar in West-Central Napa County, warning of heavy rainfall and the potential for dangerous debris flows.\u00a0<\/p>\n
The alert, which was in effect through 5\u00a0p.m., covered the region from Pickett Road to Silverado Trail, including Simmons Canyon and nearby rural terrain.<\/p>\n
The NWS said shortly before 5 p.m. that heavy rain had ended in Napa, although lighter rain could persist.\u00a0<\/p>\n