TABLE OF CONTENTS Chapter 6: Safety Element 1. INTRODUCTION ........................................................................................................................................ 1 PURPOSE, SCOPE, AND CONTENT ...................................................................................................................... 1 REGULATORY FRAMEWORK ............................................................................................................................... 2 RELATIONSHIP TO OTHER DOCUMENTS .............................................................................................................. 3 Other General Plan Elements .................................................................................................................... 3 Area Plans .................................................................................................................................................. 3 Multi-Jurisdictional Local Hazard Mitigation Plan ....................................................................................... 3 RELATIONSHIP TO THE EMERGENCY MANAGEMENT DEPARTMENT ....................................................................... 4 HAZARD REDUCTION ......................................................................................................................................... 4 2. ISSUES AND POLICIES ............................................................................................................................ 6 CODE CONFORMANCE AND DEVELOPMENT REGULATIONS ................................................................................... 7 Policies ....................................................................................................................................................... 7 SEISMIC AND GEOLOGIC HAZARDS ..................................................................................................................... 8 Policies ....................................................................................................................................................... 9 Fault Rupture .......................................................................................................................................................... 9 Seismically-Induced Liquefaction, Landslides, and Rock Falls ............................................................................. 10 Landslides, Rockfalls, and Debris Flows ............................................................................................................... 11 Subsidence and Expansive and Collapsible Soils ................................................................................................ 11 Wind Erosion ........................................................................................................................................................ 12 FLOOD AND INUNDATION HAZARDS .................................................................................................................. 12 Policies ..................................................................................................................................................... 13 Flood and Inundation Hazard Abatement ............................................................................................................. 13 High-Risk Facilities ............................................................................................................................................... 14 Risk Assessment .................................................................................................................................................. 15 FIRE HAZARDS ................................................................................................................................................ 15 Policies ..................................................................................................................................................... 16 Building Code and Performance Standards ......................................................................................................... 16 Wind-Related Hazards .......................................................................................................................................... 20 General and Long-Range Fire Safety Planning .................................................................................................... 20 HAZARDOUS WASTE AND MATERIALS ............................................................................................................... 21 Policies ..................................................................................................................................................... 22 DISASTER PREPAREDNESS, RESPONSE, AND RECOVERY .................................................................................. 22 Policies ..................................................................................................................................................... 23 Disaster Preparedness ......................................................................................................................................... 24 Critical Facilities and Lifelines ............................................................................................................................... 25 Disaster Recovery Plans ....................................................................................................................................... 27 Public Information and Outreach .......................................................................................................................... 27 ADDITIONAL CLIMATE CHANGE-RELATED HAZARDS .......................................................................................... 27 Drought ..................................................................................................................................................... 27 Extreme Heat ............................................................................................................................................ 28 Severe Weather ........................................................................................................................................ 28 Agricultural Hazards ................................................................................................................................. 29 Policies ..................................................................................................................................................... 29 County of Riverside General Plan June 2021 S-i 3. TECHNICAL BACKGROUND INFORMATION ....................................................................................... 31 SEISMIC AND GEOLOGIC HAZARDS ................................................................................................................... 31 Seismic Hazards ....................................................................................................................................... 31 Geologic Hazards ..................................................................................................................................... 34 Potential Changes to Seismic and Geologic Risk in Future Years ........................................................... 38 Likelihood of Future Occurrence ........................................................................................................................... 38 Climate Change and Seismic and Seismic Hazards ............................................................................................. 39 FLOOD AND INUNDATION HAZARDS ................................................................................................................... 39 Potential Changes to Flood Risk in Future Years ..................................................................................... 44 Likelihood of Future Occurrence ........................................................................................................................... 44 Climate Change and Flooding ............................................................................................................................... 44 FIRE HAZARDS ................................................................................................................................................ 45 Wildfires .................................................................................................................................................... 45 Wildland-Urban Interface Fires ................................................................................................................. 45 Structural Fires .......................................................................................................................................... 46 Fire Responsibility Areas .......................................................................................................................... 46 Past Occurrences ..................................................................................................................................... 50 Fire Protection ........................................................................................................................................... 53 Potential Changes to Fire Risk in Future Years ........................................................................................ 53 Likelihood of Future Occurrence ..........................................................................................................................