Update: Coastal flood advisory issued for Northern California until 2 a.m. Friday
North Bay Interior Valleys and San Francisco Bay Shoreline as well as San Francisco County are the focus of an updated coastal flood advisory released at 8:26 a.m. on Thursday by the National Weather Service. The advisory is valid from 9 p.m. until Friday July 25, at 2 a.m.
“Minor coastal flooding expected,” the NWS San Francisco CA said. “Up to one foot inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. At the San Francisco tidal gauge high tide is expected to be 0.92 feet above normal (6.76 ft MLLW) at 11:40 p.m. Thursday. High tide timing varies up to 2 hours earlier or later along the coast and throughout the Bay.”
“Flooding of lots, parks, and roads with only isolated road closures expected,” according to the NWS. “If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.”
How to use a sandbag and where to get sandbags in your area:
Follow these instructions on how to use sandbags and other flood preparation tips to protect your home, and click on the links below to get sandbags in your county:
Where to get sandbags in San Mateo County
Where to get sandbags in Alameda County
Where to get sandbags in Santa Clara County
Understanding the differences between advisories, watches, and warnings
- Flash flood warning: Take action!
A flash flood warning is issued when a flash flood is either imminent or already occurring. In flood-prone areas, it’s crucial to move immediately to higher ground. A flash flood is a sudden and violent inundation that can develop within minutes to hours, and it can even happen in areas not currently experiencing rainfall.
- Flood warning: Take action!
A flood warning is issued when flooding is imminent or occurring.
- Flood advisory: Be aware:
A flood advisory is issued when flooding is not expected to be bad enough to issue a warning. However, it may cause significant inconvenience, and if caution is not exercised, it could lead to situations that may threaten life and/or property.
- Flood watch: Be prepared:
A flood watch is issued when conditions are favorable for flooding. It doesn’t guarantee that flooding will occur, but it signifies that the possibility exists.
When floods strike: Guidelines from the NWS for your protection
Floods can pose a significant threat, especially if you live in a flood-prone area or find yourself camping in a low-lying region. To ensure your safety, the NWS offers essential flood safety guidelines:
Move to higher ground:
If you reside in a flood-prone region or are camping in low-lying terrain, the first step to safety is relocating to higher ground.
Adhere to evacuation orders:
If local authorities issue an evacuation order, heed it promptly. Prior to leaving, secure your home by locking it.
Disconnect utilities and appliances:
If time allows, disconnect your utilities and appliances. This reduces the risk of electrical hazards during flooding.
Steer clear of flooded basements and submerged areas:
Steer clear of basements or rooms where water has submerged electrical outlets or cords. This helps prevent electrical accidents.
Swift evacuation for your safety:
If you notice sparks or hear buzzing, crackling, snapping, or popping sounds, evacuate without delay. Do not enter water that may carry an electrical charge.
Refrain from walking in floodwaters:
Never attempt to walk through floodwaters. Even just 6 inches of swiftly moving water can forcefully knock you off your feet.
Seek higher ground when trapped:
In the event you become trapped by moving water, make your way to the highest point available and contact emergency services by calling 911.
During heavy rain, flooding is possible, especially in low-lying and flood-prone areas. Never drive through water on the road, even if it does not appear to be deep. It takes just 12 inches of rushing water to carry away most cars, according to the NWS. Prioritize your safety by staying informed and prepared.