The National Weather Service updated a flood warning for San Bernardino County late Tuesday as heavy, persistent rainfall continued to produce standing water and inundated low‑water crossings across the region.
Scope and timing of the warning
The watch, issued by the NWS Las Vegas office, covers parts of southern California including much of San Bernardino County. The advisory was updated at 8:18 p.m. Tuesday and remained in effect into the night; specific end times vary by bulletin. The NWS warned that flooding caused by excessive rainfall would continue through the evening and could affect travel and low‑lying areas.
What residents should expect
Forecasters cautioned that many low‑water crossings are inundated with water and may not be passable, and that numerous areas could see slow‑moving or standing water. The agency emphasized that most flood deaths occur in vehicles and warned residents to avoid attempting to cross flooded roadways.
“Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding,”
The NWS also noted that in hilly terrain there are hundreds of potentially dangerous low‑water crossings that can become hazardous during heavy rain.
Public safety steps and resources
Local officials urged residents to monitor travel conditions and official channels for road closures. The transportation agency CalTrans posts closure updates on its website and mobile app, and by phone at 800‑427‑7623. For more severe hazards, emergency alerts will be pushed to enabled mobile phones in affected areas; for lesser risks the NWS and county offices recommended signing up for local alert systems and following agency social media accounts.
- Avoid driving through floodwaters. Roadways may be covered or washed out even where water appears shallow.
- Find alternate routes. Do not attempt to cross inundated low‑water crossings.
- Sign up for local alerts. County-specific registration pages were provided for San Bernardino and neighboring counties.
For residents concerned about property protection, county fire departments often provide a limited supply of free sandbags for nearby communities. Those seeking sandbags are advised to bring a shovel, be prepared to show proof of residency, and note that home improvement stores also sell sand and sandbags.
| Resource | How to access |
|---|---|
| CalTrans road closure information | Website, mobile app, or 800‑427‑7623 |
| San Bernardino County sandbags | County fire department distribution (limited supply) — see county website |
| Emergency alerts | Automatic for considerable/catastrophic hazards; sign up for lesser-risk messages via county alert systems |
Local impact and what to watch for
San Bernardino County’s varied terrain — from low desert washes to hilly foothills — means impacts will vary substantially by neighborhood. Where roads funnel runoff into low crossings, even short periods of intense rain can produce hazardous conditions and rapid rises in water depth. Nighttime conditions make flood hazards harder to see, increasing the risk for motorists.
Authorities urged residents to take warnings seriously, keep informed via official channels and avoid needless travel until waters recede and roads reopen. Those who encounter flooded roadways should find an alternate route and report severe weather or hazards to local law enforcement or the NWS Las Vegas office.
As conditions evolve, WE NEWS will continue to monitor NWS updates and local agency notices for San Bernardino County and report significant changes affecting travel, evacuations or community safety.
