The National Weather Service issued an updated flood advisory for San Bernardino County at 8:04 p.m. Monday, warning residents that excessive rainfall continues to produce minor flooding in low-lying and poor-drainage areas. The advisory remained in effect until 9:45 p.m.
What the advisory says
The NWS Las Vegas office said the situation involves ongoing flooding caused by heavy rain. While the advisory indicates flooding is not expected to reach the level that would trigger a warning, it cautioned that conditions could still create significant inconvenience and hazardous situations for people and property.
“Flooding caused by excessive rainfall continues. Minor flooding in low-lying and poor drainage areas. Overflowing poor drainage areas. Some low-water crossings may become impassable,”
The agency reminded drivers of the long-standing safety message: “Turn around, don’t drown”, noting that most flood-related fatalities occur in vehicles. The NWS also asked members of the public to report observed flooding to local emergency services or law enforcement so that those agencies can relay verified information to the weather service when it is safe to do so.
Where and when
| County | Advisory issued | Advisory expires |
|---|---|---|
| San Bernardino | 8:04 p.m. Monday | 9:45 p.m. Monday |
| Mohave | 8:04 p.m. Monday | 9:45 p.m. Monday |
| Clark | 8:04 p.m. Monday | 9:45 p.m. Monday |
Local impacts and guidance
According to the NWS description, expected impacts include overflowing poor drainage areas and the potential for some low-water crossings to become impassable. For residents and motorists in San Bernardino, the primary short-term concerns are flash flooding on streets, localized inundation that can block driveways and underpasses, and reduced visibility while driving in heavy rain.
- Avoid driving through flooded roadways — most flood deaths occur in vehicles.
- Seek higher ground if you are in a low-lying or flood-prone area.
- Report observed flooding to local emergency services so they can forward verified information to the NWS.
- Follow any evacuation orders issued by local authorities and disconnect utilities if time allows before evacuating.
The NWS also provided a concise explanation of the different flood products to help residents assess risk: a flash flood warning indicates a flash flood is imminent or occurring and requires immediate action; a flood warning means flooding is expected or already happening; a flood advisory — like the current one — means flooding is likely not severe enough to warrant a warning but can still cause disruption; and a flood watch advises that conditions are favorable for flooding.
Preparation and reporting
City and county public safety offices typically monitor NWS alerts and coordinate responses as needed. For residents, that coordination translates into road closures, public advisories and, in the most severe situations, evacuation orders. At this stage, with an advisory in effect, officials are urging caution and situational awareness rather than mandatory evacuations.
People should take common-sense steps to reduce risk: move vehicles off low-lying streets, secure outdoor belongings that can float or wash away, and avoid walking through moving water. If you encounter a flooded road, remember that even shallow, fast-moving water can sweep a vehicle off the roadway.
WE NEWS will continue monitoring updates from the National Weather Service and local emergency agencies and will provide additional information if the advisory is upgraded, extended or if impacts escalate.
