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Ontario, CA Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Ontario, CA
Elevation: 1066ft
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Active Weather Alerts

Flood Advisory
Issued: 12:41 AM Sep. 9, 2026 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 745 PM PDT THIS EVENING...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...San Bernardino County in southern California...

* WHEN...Until 745 PM PDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 540 PM PDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Radar estimated 0.25 and 0.5 inches
of rain have fallen so far.
- Additional rainfall amounts of 0.5 to 1 inch are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Mount San Gorgonio, Onyx Summit, Hwy 38 Between Onyx Summit And
Sugarloaf, Hwy 38 Between Yucaipa And Onyx Summit and Heart Bar
Campground.
- https://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&



Flood Advisory
Issued: 12:04 AM Sep. 9, 2026 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 7 PM PDT THIS EVENING...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...San Bernardino County in southern California...

* WHEN...Until 700 PM PDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways.

* ADDITIONAL DETAILS...
- At 503 PM PDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain has
fallen.
- Additional rainfall amounts of 0.5 to 1 inch are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Big Bear City, Big Bear Lake, Baldwin Lake, Seven Oaks, Hwy 18
Between Baldwin Lake And Lucerne Valley, Hwy 38 Between Yucaipa
And Onyx Summit, Hwy 38 Between Onyx Summit And Sugarloaf, Barton
Flats Campground, Woodlands and Fawnskin.
- https://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&



Heat Advisory
Issued: 8:52 PM Sep. 8, 2026 – National Weather Service
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT
THURSDAY...

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with temperatures high temperatures in the upper 90s to 107 with
low temperatures in the 70s expected. For the Heat Advisory, high
temperatures in the mid 90s to 102 expected.

* WHERE...San Bernardino and Riverside County Valleys-The Inland
Empire.

* WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For
the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Major HeatRisk through Wednesday. Warm
overnight temperatures will limit overnight relief from the heat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

&&

Extreme Heat Warning
Issued: 8:52 PM Sep. 8, 2026 – National Weather Service
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT
THURSDAY...

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with temperatures high temperatures in the upper 90s to 107 with
low temperatures in the 70s expected. For the Heat Advisory, high
temperatures in the mid 90s to 102 expected.

* WHERE...San Bernardino and Riverside County Valleys-The Inland
Empire.

* WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For
the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Major HeatRisk through Wednesday. Warm
overnight temperatures will limit overnight relief from the heat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

&&

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