More for California: Highest flood risk cities · California live outlook
Current risk outlook
Flooding and heavy rain risk for Fontana, CA.
Live conditions updated just now. Refreshes every 5–40 minutes.
This view focuses on street flooding, ponding in low-lying areas, and how heavy rain tends to behave around this city.
Live risk outlook
LOWLow
Next 6–24 hours: Today: Low (10/100) · Rain 0% · 0.0 in · Max wind 0 to 15 mph.
1 active alert nearby.
Sources: NOAA, NWS, SPC, NHC, FEMA, USGS.
Historical risk score
Long-term baseline derived from historical hazard activity.
26
/ 100
For typical homes located in Fontana, CA.
Baseline context
FEMA NFHL flood zones: 9 features intersect this tile.
Compare other local risks
See how Fontana scores across each hazard model.
City snapshot
All hazards combined
Wind risk
Roof stress and gust-driven damage
AQI risk
Current air quality and AQI signal
Lightning risk
Thunderstorm and strike exposure
Wildfire risk
Fuels, dryness, and fire potential
Tornado risk
Historic tornado corridor exposure
Hail risk
Hail frequency and roof impact potential
Local historical hazard map
Fontana, CA
Click a tile to update scores. These layers show long-term historical baseline risk, not live warnings or short-term forecast risk.
Live flood alerts & official forecast (NWS)
Forecast office: SGX · radar KSOX
Active alerts near Fontana
Heat Advisory
Effective local time
Heat Advisory issued May 10 at 11:25AM PDT until May 11 at 8:00PM PDT by NWS San Diego CA
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Protect your home before the next storm
Turn today’s risk into a checklist for your home.
Flood intelligence snapshot
FEMA flood zones (NFHL)
Dominant zone: X (63% of features)
SFHA share: 37% (feature-weighted)
NFHL features in tile: 67
Tile risk label: Moderate
Source: FEMA NFHL (MapServer).
Nearest river gauge (USGS)
No nearby USGS gauges reporting right now.
Source: USGS NWIS (instant values).
Soil saturation (model)
Soil moisture: 6% volumetric
Last 24h rain: 0.00 in
Updated: local time
Source: Open-Meteo soil model (proxy).
Protect your home before the next storm
Turn today's flood exposure into a checklist for drains, valuables, and coverage in Fontana, CA.
5-day flood & rain outlook
Today
LOWRain chance: 0% · 0.0 in
Max wind: 0 to 15 mph
Risk score: 10/100
Tomorrow
LOWRain chance: 0% · 0.0 in
Max wind: 0 to 15 mph
Risk score: 10/100
Tue
LOWRain chance: 0% · 0.0 in
Max wind: 5 to 15 mph
Risk score: 10/100
Wed
LOWRain chance: 0%
Max wind: 0 to 15 mph
Risk score: 10/100
Thu
LOWRain chance: 1%
Max wind: 0 to 15 mph
Risk score: 10/100
Outlook blends NWS forecast, WPC QPF totals, and Excessive Rainfall Outlook categories.
Historical flooding exposure
Local flood data facts
Data from FEMA NFHL, USGS gauges, and Open-Meteo soil moisture.
Historical flooding exposure in Fontana
- Lowest-lying streets and drainage chokepoints tend to flood first during heavy rain.
- Long-duration rainfall can raise ponding risk even without a named storm.
- Local elevation and canal/river networks can amplify or reduce flood impacts.
Flood & storm risk FAQs for Fontana
Does Fontana flood often?
Flooding risk depends on elevation, drainage, and rainfall intensity. This model summarizes localized flood patterns from public datasets.
What causes street flooding without a storm surge?
Short bursts of heavy rain can overwhelm drains; longer events can saturate soils and keep water standing even after rain ends.