PERRIS
OperatingHydro power plant
- Capacity
- 8 MW
- Primary fuel
- Hydro
- County
- Riverside County
- Operator
- METROPOLITAN WATER DISTRICT OF S CA
- Status
- Operating
- Commissioned
- 1983
- EIA plant ID
- 481
- Coordinates
- 33.8361, -117.1831
PERRIS, an 8 MW Hydro power plant in Riverside County, California. Operated by METROPOLITAN WATER DISTRICT OF S CA, commissioned 1983.
Weather peril exposure
PERRIS is an 8 MW hydro power plant in Riverside County, CA, operated by METROPOLITAN WATER DISTRICT OF S CA, commissioned in 1983. Riverside County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.6 of 5 at the 40th national percentile. Wildfire is the leading peril, rated Very High by FEMA at the 100th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Riverside County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Very High | 100th | 5.0 of 5 | 0.02 |
| Earthquake | Very High | 98th | 4.9 of 5 | 0.12 |
| Riverine flooding | Very High | 98th | 4.9 of 5 | 7.4 |
| Heat wave | Relatively High | 72nd | 3.9 of 5 | 13.8 |
| Hail | Relatively Moderate | 15th | 1.6 of 5 | 0.08 |
| Tornado | Relatively Moderate | 15th | 1.6 of 5 | 0.45 |
| Strong wind | Relatively Moderate | 2nd | 1.1 of 5 | 0.23 |
| Winter weather | Relatively Moderate | 0th | 1.0 of 5 | 2.4 |
| Lightning | Relatively Moderate | 0th | 1.0 of 5 | 13.8 |
| Hurricane | Very Low | 0th | 1.0 of 5 | 0.01 |
Perils not assessed in Riverside County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
| Ice storm | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Riverside County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.