Storms in San Joaquin County can bring more than just heavy rain. They can create dangerous conditions that affect our communities across the valley, foothills, and Delta regions. Strong winds, lightning, and localized flooding can occur with little warning, leading to power outages, road closures, and property damage. Winter storms can overwhelm drainage systems, down trees and power lines, and make travel unsafe. Being aware of the hazards and knowing what to do before, during, and after a storm can make all the difference.

Sandbag Locations

Sandbags are available for residents in the cities listed below. Sandbags can help reduce water from entering your home if flooding occurs. Place sandbags in low areas, along doorways, garage doors, and other entry points where water may come in.

City of Lathrop
Skate Park Parking Lot
15685 Seventh Street
Lathrop, CA 95330
*10 bags limit per household

City of Manteca
210 W Wetmore St
Manteca, CA 95337
For residents

City of Mountain House
Fire Station No 1 in public parking lot
911 Tradition St
Mountain House, CA 95391
*Bags provided and the public will need to bring their own shovel

City of Tracy
Transit Station Parking Lot
50 E 6th St,
Tracy, CA 95376
*Located at the self-serve area on the east end of the parking lot with a limit of 10 bags. Visit the City of Tracy for more information.

Watch how to fill and where to place sandbags

Warming Centers

Warming centers are now open throughout San Joaquin County and offer community members a warm, dry, and safe place to stay during the storm. While most warming centers are open during regular business hours, community members are encouraged to contact the locations listed below for more information on holiday hours of operation. For more information about warming centers, visit the links below or call 2-1-1.

• County Warming Centers
• City of Tracy

Warming Center Locations

Name	Address	City	State	Zip	Phone
Lodi Community Center	415 South Sacramento Street	Lodi	CA	95240	(209) 331-7516
Boggs Tract Center	533 S. Los Angeles Street	Stockton	CA	95203	(209) 468-3978
Northeast Community Center	2885 E. Harding Way	Stockton	CA	95205	(209) 468-3918
Kennedy Community Center	2800 South D Street	Stockton	CA	95206	(209) 468-3986
Garden Acres Community Center	607 Bird Avenue	Stockton	CA	95215	(209) 468-3984
Taft Community Center	389 W. Downing Ave	Stockton	CA	95206	(209) 468-4168
Thornton Community Center	26675 N. Sacramento Blvd	Thornton	CA	95686	(209) 468-1784
Larch Clover Community Center	11157 West Larch Road	Tracy	CA	95376	(209) 831-5920
Tracy Branch Library	20 E. Eaton Ave	Tracy	CA	95376	(866) 805-7323
Lolly Hansen Senior Center	375 E. 9th Street	Tracy	CA	95376	(209) 831-6240
West Valley Mall	3200 N. Naglee Road	Tracy	CA	95376	(209) 836-4091
Transit Station	50 E. 6th Street	Tracy	CA	95376	(209) 831-4287

Strong Winds

High winds are a common hazard in South San Joaquin County, especially during strong winter storms and transitional weather in the spring and fall. Open farmland and wide, flat terrain in areas such as Tracy, Mountain House, Ripon, and Manteca can experience stronger gusts due to limited wind barriers. These conditions can create dangerous travel situations, damage property, and disrupt power service.

Safety tips:

• Secure or move outdoor furniture and loose items such as patio umbrellas, trampolines, planters, toys, and garbage bins.
• Trim trees and remove debris around your home to prevent damage or blocked pathways.
• Stay away from downed power lines and assume they are LIVE. Do not touch, walk, or drive near them. Report it immediately to local authorities and your utility provider.

Get the latest information on wind safety on the National Weather Service website.

Flood Safety

Delta region. Urban flooding is also common when storm drains become overwhelmed. Even a few inches of moving water can sweep vehicles off the road and create life-threatening conditions.

Safety tips:

• Never walk or drive through flooded streets.
• Move to higher ground if flooding begins in your area.
• Keep emergency supplies and sandbags on hand if you live in a flood-prone zone.

For more flood safety tips, go to the Flood Safety page.

Lightning

Lightning strikes can occur miles from the center of a storm and are one of the leading causes of storm-related injuries and deaths. In San Joaquin County, lightning is most common during summer and early fall thunderstorms, often affecting open fields, agricultural areas, parks, and the outskirts of cities. Even when storms seem distant, lightning can strike trees, buildings, or individuals in exposed areas.

Safety Tips

• When you hear thunder, seek shelter indoors immediately.
• Avoid open fields, tall objects, and isolated trees.
• Stay away from water and corded electronics during a storm.
• Remain indoors for at least 30 minutes after the last clap of thunder.

Lightning can be unpredictable, but understanding where it occurs and taking precautions can significantly reduce the risk of injury.

Power Outage

While widespread power outages are relatively rare in the county, but severe storms can damage electrical systems, leaving homes and businesses without electricity for hours or even days. Being prepared ahead of time can help keep you and your family safe during these unexpected outages.

Safety Tips

• Keep flashlights, extra batteries, and a battery-powered radio on hand for use during an outage.
• If using a generator, operate it outdoors and away from windows and doors to prevent carbon monoxide poisoning.
• Unplug sensitive electronics to protect them from potential power surges when electricity is restored.
• PG&E customers should go to the PG&E Outage Center to sign up for PG&E alerts, report an outage and view the power outage map.

Daily life, so taking simple precautions can make a significant difference when storms impact power in San Joaquin County.

Debris and Structural Damage

During and after a storm passes, flying debris, fallen branches, and weakened structures can continue to pose serious hazards. Storm debris can obstruct drains, gutters, and streets, increasing the risk of localized flooding and ponding. Damaged buildings, roofs, and fences may be unstable, creating additional dangers for residents and emergency responders.

Safety Tips

• Wear sturdy shoes, gloves, and long sleeves when cleaning up debris to protect against cuts and scrapes.
• Avoid entering damaged buildings until officials have declared them safe.
• Watch for broken glass, nails, sharp objects, and unstable structures when moving through storm-affected areas.
• Clear gutters and drains carefully if it is safe to do so, to help reduce post-storm flooding.

Being cautious during cleanup and avoiding unstable areas can help prevent injuries and further damage in the aftermath of storms.

Be Storm Ready in 3 Steps

Taking a few simple steps before a storm can make a big difference in keeping you, your family, and your property safe. By preparing ahead of time, you can reduce risks, respond quickly to changing conditions, and avoid unnecessary danger. Following these three steps will help you stay prepared, stay informed, and stay safe when severe weather strikes San Joaquin County. Being proactive today ensures you are ready for whatever a storm may bring tomorrow.

1. Sign up for SJReady Alerts
2. Make a plan
3. Build an emergency supply kit

Learn more about the Ready in 3 Steps campaign!