CAMERON COUNTY HAZARD MITIGATION ACTION PLAN UPDATE 2021 Planning Participants: Cameron County, City of Harlingen, City of Palm Valley Maintaining a Safe, Secure, and Sustainable Community APA: February 2, 2021 For more information, visit our website at: https://www.cameroncounty.us/emergency-management/ Written comments should be forwarded to: Cameron County Judge’s Division Office of Emergency Management 964 E. Harrison St. Brownsville, Texas 78520 Email: [email protected] SECTION 1 – INTRODUCTION Background ............................................................................................................................. 1-1 Scope and Participation .......................................................................................................... 1-2 Purpose .................................................................................................................................. 1-2 Authority.................................................................................................................................. 1-3 Summary of Sections .............................................................................................................. 1-3 SECTION 2 – PLANNING PROCESS Plan Preparation and Development ......................................................................................... 2-1 Review and Incorporation of Existing Plans ............................................................................ 2-7 Timeline for Implementing Mitigation Actions ........................................................................ 2-10 Public and Stakeholder Involvement ..................................................................................... 2-11 SECTION 3 – COUNTY PROFILE Overview ................................................................................................................................. 3-1 Population and Demographics ................................................................................................ 3-3 Future Development ............................................................................................................... 3-5 Economic Impact .................................................................................................................... 3-5 Existing and Future Land Use and Development Trends ........................................................ 3-6 SECTION 4 – RISK OVERVIEW Hazard Description ................................................................................................................ 4-1 Natural Hazards and Climate Change .................................................................................... 4-4 Overview of Hazard Analysis ................................................................................................. 4-4 SECTION 5 – FLOOD Hazard Description ................................................................................................................ 5-1 Location .................................................................................................................................. 5-1 Extent .................................................................................................................................... 5-3 Historical Occurrences ........................................................................................................... 5-7 Probability of Future Events ................................................................................................... 5-9 Vulnerability and Impact ....................................................................................................... 5-11 NFIP Participation ................................................................................................................ 5-14 NFIP Compliance and Maintenance ..................................................................................... 5-15 Repetitive Loss .................................................................................................................... 5-16 Cameron County | Hazard Mitigation Action Plan Update | Page 2 SECTION 6 – HURRICANE WIND Hazard Description ................................................................................................................ 6-1 Location .................................................................................................................................. 6-1 Extent .................................................................................................................................... 6-2 Historical Occurrences ........................................................................................................... 6-4 Probability of Future Events ................................................................................................... 6-7 Vulnerability and Impact ......................................................................................................... 6-7 SECTION 7 – EXTREME HEAT Hazard Description ................................................................................................................ 7-1 Location .................................................................................................................................. 7-1 Extent .................................................................................................................................... 7-1 Historical Occurrences ........................................................................................................... 7-4 Probability of Future Events ................................................................................................... 7-6 Vulnerability and Impact ......................................................................................................... 7-6 SECTION 8 – THUNDERSTORM WIND Hazard Description ................................................................................................................ 8-1 Location .................................................................................................................................. 8-1 Extent .................................................................................................................................... 8-2 Historical Occurrences ........................................................................................................... 8-3 Probability of Future Events ................................................................................................... 8-7 Vulnerability and Impact ......................................................................................................... 8-8 SECTION 9 – LIGHTNING Hazard Description ................................................................................................................ 9-1 Location .................................................................................................................................. 9-1 Extent .................................................................................................................................... 9-1 Historical Occurrences ........................................................................................................... 9-3 Probability of Future Events ................................................................................................... 9-4 Vulnerability and Impact ......................................................................................................... 9-4 SECTION 10 – DROUGHT Hazard Description .............................................................................................................. 10-1 Location ................................................................................................................................ 10-2 Extent .................................................................................................................................. 10-3 Cameron County | Hazard Mitigation Action Plan Update | Page 3 Historical Occurrences ......................................................................................................... 10-4 Probability of Future Events ................................................................................................. 10-6 Vulnerability and Impact ....................................................................................................... 10-7 SECTION 11 – TORNADO Hazard Description .............................................................................................................. 11-1 Location ................................................................................................................................ 11-2 Extent .................................................................................................................................. 11-2 Historical Occurrences ......................................................................................................... 11-5 Probability of Future Events ................................................................................................. 11-9 Vulnerability and Impact ....................................................................................................... 11-9 SECTION 12 – HAIL Hazard Description .............................................................................................................. 12-1 Location ................................................................................................................................ 12-1 Extent