Right now
The most recent data we hold from CAP CA ECCC arrived 2 hours ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
Official warning
Highest level recorded for this local day: Moderate.
Level in this notice: Moderate.
Environment Canada
yellow advisory - fog - in effect
Areas of dense fog are occurring.
When: Now through early this morning.
Where: Parts of Metro Vancouver and the Western Fraser Valley, particularly near and south of the Fraser River.
###
Visibility will likely be suddenly reduced at times.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to BCstorm@ec.gc.ca or post reports on social media using #BCStorm.
If driving, turn on your lights, slow down and maintain a safe following distance.
This alert is in force until 7 October 2026, 17:03 UTC.
It is the only one we have recorded within 20 km of this point since 7 October 2026.
What the source measured
CAP CA ECCC reported: Areas of dense fog are occurring. When: Now through early this morning. Where: Parts of Metro Vancouver and the Western Fraser Valley, particularly near and south of the Fraser River. ### Visibility will likely be suddenly reduced at times. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to BCstorm@ec.gc.ca or post reports on social media using #BCStorm.
Urban PEI: 4,812,826 within a heuristic 50 km radius; not unique people.
How we know
One source: CAP CA ECCC. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Event data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.66/1 |
| Coordinates | 49.1128, -122.6831 |
| Nearest city | Willoughby (2 km) |
| Urban exposure index (PEI) | 4.8M within 50 km |
| Impact tier | significant |
| Timestamp | 2026-10-07T07:20:00.000Z |
| Source | https://dd.weather.gc.ca/today/alerts/cap/20261007/CWVR/07/T_WOCN11_C_CWVR_202610070720_3317689438.cap |
| Licence | ECCC Data Services End-use Licence 2.1.1 · Environment and Climate Change Canada · Grouped by area and local day; CAP severity mapped; map location derived from alert geometry. Original warning text preserved. |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: cap_ca_eccc. Occurrence: 2026-10-07T07:20:00.000Z.
First archived: 2026-10-07T07:31:49.100Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score breakdown
Technical details
| Event | fog |
| AreaDesc | Metro Vancouver - southeast including Surrey and Langley |
| Geocodes | [{"name":"layer:EC-MSC-SMC:1.0:CLC","value":"082640-082713"},{"name":"profile:CAP-CP:Location:0.3","value":"5915001"},{"name":"profile:CAP-CP:Location:0.3","value":"5915002"},{"name":"profile:CAP-CP:Location:0.3","value":"5915004"},{"name":"profile:CAP-CP:Location:0.3","value":"5915007"},{"name":"profile:CAP-CP:Location:0.3","value":"5915801"},{"name":"profile:CAP-CP:Location:0.3","value":"5915809"},{"name":"profile:CAP-CP:Location:0.3","value":"5915813"},{"name":"profile:CAP-CP:Location:0.3","value":"5915816"},{"name":"profile:CAP-CP:Location:0.3","value":"5915825"}] |
| Onset | 2026-10-07T07:20:00-00:00 |
| Effective | 2026-10-07T07:20:52-00:00 |
| Expires | 2026-10-07T17:03:52-00:00 |
| TimeBasis | onset |
| LocalDay | 20261007 |
| CapTimeZone | America/Vancouver |
| CapDayBasis | area-centroid-timezone |
| CapSeverity | Moderate |
| DailyPeakCapSeverity | Moderate |
| CapUrgency | Immediate |
| CapCertainty | Likely |
| Urgency | Immediate |
| Certainty | Likely |
| Headline | yellow advisory - fog - in effect |
| Description | Areas of dense fog are occurring. When: Now through early this morning. Where: Parts of Metro Vancouver and the Western Fraser Valley, particularly near and south of the Fraser River. ### Visibility will likely be suddenly reduced at times. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to BCstorm@ec.gc.ca or post reports on social media using #BCStorm. |
| Instruction | If driving, turn on your lights, slow down and maintain a safe following distance. |
| SenderName | Environment Canada |
Safety information
What to do in dense fog
First three things, then what to do before, during and after. From the US National Weather Service’s fog safety pages.
For this reportSevere Weather · Willoughby
Slow down, low beams on
Slow down and leave plenty of room to the vehicle ahead. Use low-beam headlights, and fog lights if you have them, so your tail lights are on too. Never high beams: their glare makes it harder to see.
NWSIf you cannot see, get off the road
Turn on your hazard lights and pull into a safe place, such as a car park. If there is none, pull as far off the road as you can, keep only the hazard lights on and take your foot off the brake, so no one follows your lights into you.
NWSOn the water, slow down and listen
Turn on all your running lights, listen for other boats and for fog horns, and keep out of shipping lanes: large ships cannot see you.
NWS
Before, during, after. Here it is still “during”.
Before · When fog is forecast
Allow extra time
You will need to drive more slowly than usual.
On a boat, know where you are
A compass, GPS or a chart, and radar if you have it.
US National Weather Service
During · In the fog
Follow the lines
Keep your eyes on the road markings to stay in your lane.
Keep your distance
Leave room for sudden stops and changes in the traffic.
Lost on the water
If you cannot get your bearings, stay put in a safe place until the fog lifts.
US National Weather Service
After · When it lifts
Below freezing, watch for ice
Freezing fog leaves a thin, almost invisible layer of ice on roads, steps and pavements. Drive more slowly where it may be icy.
US National Weather Service
Questions people ask
Why not use high beams in fog?
Their light bounces back off the fog and dazzles you: you see less, not more. Use low beams, and fog lights if you have them. Source: US National Weather Service (NWS).
What should I do if I can see almost nothing?
Turn on your hazard lights and pull into a safe place, such as a car park. If you have to stop at the roadside, pull as far off as you can, keep only the hazard lights on and take your foot off the brake. Source: US National Weather Service (NWS).
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