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UNDER CONSTRUCTION
Liquifaction
Riverview West Neighborhood Lies within a Large Liquifaction Zone
Jan. 15, 2020
- Orange County, CA Liquifaction Zones
- Worried about being on top of an earthquake fault?
- CA Dept. of Conservation
TOC Costa Mesa Master
- Keep a small shovel in the car
- Stock up on complimentary sand bags from the City of Santa Ana
- Plan ahead where to meet family during a disaster
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WAYS TO PREPARE RIVERVIEW WEST NEIGHBORHOOD:
- Stay informed via social media: AlertOC, ReadyOC, Nixle, Pacific Disaster Center (PDC), American Red Cross (Orange County), Orange County Fire Authority, Orange County Emergency Management, California Office of Emergency Services, Riverview West Nextdoor.
- Find out if your home is in a vulnerable area by finding out the distance it is from the coast.
- If you live or are in a low-lying area – for instance near to the beach – identify the quickest way to get to high ground. A safe area would be at least 30m (or 100 feet) above sea level and 7+ miles inland. Teach and practice your evacuation plan with all family members.
- Ensure that all family members can recognize natural tsunami signs as timely, official Tsunami Warnings may not be possible.
- Discuss tsunamis with your family and friends. Everyone needs to know what to do in case all members are not together.
- Emergency supplies and equipment such as canned foods, medication, flashlights, battery-powered radios, clean water and First Aid kits should be readily available and working properly.
- Post Tsunami Evacuation Route signage on Euclid St., Newhope St., Harbor Blvd., Edinger Ave., McFadden Ave., 1st St., and 5th St.
- Install Voice Mass Notification Speakers as well as Tsunami Sirens for the areas of Riverview West designated as tsunami inundation zones for the State of California (from Euclid St. and Edinger Ave. to 6th St. and the Santa Ana River).
- Have Orange County Fire Authority Station #78 (at Newhope St. and 5th St. in Riverview West) test tsunami warning sirens at noon on the first Friday of each month.
- Tune into your AM/FM radio to 107.9 FM and turn your TV to a local LA-based station (KCAL, KTLA, etc.) to listen for emergency information when tsunami warning sirens sound at times not designated for testing.
- Hold Tsunami Evacuation Drills that include Voice Mass Notification Speakers and Tsunami Sirens
- Make swimming lessons available to all school-aged children in Riverview West Neighborhood (perhaps, included in the local schools Physical Education program annually).
- Community Education in schools and at public events
- Become CERT trained (for free!) through local fire departments such as Costa Mesa Fire Department (the Santa Ana Fire Dept. was sold to the OC Fire Authority, which does not offer the CERT program. Santa Ana's former fire dept. CERT program has been drastically lessened and is now offered through the City of Santa Ana. The CERT program may be more fully provided through surrounding cities' fire departments; however, residents of those cities may have priority registration over non-city residents. When completed through a city fire department, trainees receive certification that may aid in legal protection under Good Samaritan laws. For more information about the CERT program and its origins, please visit the Los Angeles Fire Department's CERT website.
- Modify your home and yards to better withstand flooding: 1) Elevate the first living space floor to be above flood level (minimum of 4 feet for Santa Ana...such as above a garage and open patio), 2) Plant sturdy trees around the perimeter of your yard to create a barrier to stop large debris from damaging your home, 3) Install adequately secure fencing (such as iron) around your property to prevent/minimize debris flow from damaging your home, 4) Grade your yards to drain away from your home (as well as away from your neighbors' homes), 5) Install rain gutters along your home's roof, 6) Create a bioswale/dry creekbed to draw water run-off from the rain gutters toward berms and/or a rain garden located away from your home, 7) Create berms to prevent run-off and direct excess water into sponge-like rain gardens, 8) Turn the city-owned median strip of grass/weeds between the sidewalk and the street into a bioswale that acts like a deep sponge to absorb excess water
- Get life vests and a boat!
RESOURCES:
CGS Tsunami Program
California Seismic Safety Commission
National Oceanic and Atmospheric Administration (NOAA) Center for Tsunami Research
"The Biggest Tsunami Recorded Was 1,720 Feet Tall and Chances Are Good It Will Happen Again."
"Tsunami Preparedness in Southern California, USA"
"Japan Tsunami Caught On Tape | BBC Natural Disasters & Weather Documentary 2016."
FEMA Flood Map Service Center | Welcome!
The Tsunami Zone
Cal OES My Hazards
Harbor Mixed-Use Corridor Plan
"Huntington Beach Holds Tsunami Evacuation Drill"
"How to Prepare for a Tsunami..."
California Department of Conservation, CGS Information Warehouse: Tsunami
HELPFUL INFORMATION FOR TSUNAMI-PRONE NEIGHBORHOODS SUCH AS RIVERVIEW WEST:
"Tsunami Preparedness," City of Huntington Beach.
The City of Huntington Beach has been certified by the National Weather Service as TsunamiReady. Download information on what Huntington Beach residents need to know to prepare for a tsunami and Download the City Tsunami Evacuation Map.
The word "tsunami" is Japanese and means 'harbor wave,' because of the devastating effects these waves have had on low-lying coastal communities. Tsunamis are often incorrectly referred to as tidal waves, but a tsunami is actually a series of waves that can travel at speeds averaging 450 (and up to 600) miles per hour in the open ocean. In the open ocean, tsunamis would not be felt by ships because the wavelength would be hundreds of miles long, with an amplitude of only a few feet. This would also make them unnoticeable from the air. As the waves approach the coast, their speed decreases and their amplitude increases. Unusual wave heights have been known to be over 100 feet high. However, waves that are 10 to 20 feet high can be very destructive and cause many deaths or injuries.
All eight fire stations in Huntington Beach have warning sirens that will be used in the event of a tsunami. They are tested at noon on the first Friday of each month. When you hear the siren activate at any other time, turn on your AM/FM radio to 107.9 FM and turn your TV to a local LA based station (KCAL, KTLA, etc.) to listen for emergency information.
Stay tuned to your AM/FM radio or television stations during a tsunami emergency. Bulletins issued through the Huntington Beach Emergency Management and Homeland Security Office and NOAA offices can help save your life!
For more information on tsunamis see:
"Tsunami Preparedness," City of Huntington Beach.
The City of Huntington Beach has been certified by the National Weather Service as TsunamiReady. Download information on what Huntington Beach residents need to know to prepare for a tsunami and Download the City Tsunami Evacuation Map.
The word "tsunami" is Japanese and means 'harbor wave,' because of the devastating effects these waves have had on low-lying coastal communities. Tsunamis are often incorrectly referred to as tidal waves, but a tsunami is actually a series of waves that can travel at speeds averaging 450 (and up to 600) miles per hour in the open ocean. In the open ocean, tsunamis would not be felt by ships because the wavelength would be hundreds of miles long, with an amplitude of only a few feet. This would also make them unnoticeable from the air. As the waves approach the coast, their speed decreases and their amplitude increases. Unusual wave heights have been known to be over 100 feet high. However, waves that are 10 to 20 feet high can be very destructive and cause many deaths or injuries.
- All earthquakes do not cause tsunamis, but many do. When you hear that an earthquake has occurred, stand by for a tsunami emergency message.
- An earthquake in your area is one of nature's tsunami warning signals. Do not stay in low-lying coastal areas after a strong earthquake has been felt.
- Tsunamis are sometimes preceded by a noticeable receding of sea level as the ocean retreats seaward exposing the seafloor. A roar like an oncoming train may sometimes be heard as the tsunami wave rushes toward the shore. These are also nature's tsunami warning signals.
- A tsunami is not a single wave, but a series of waves. Stay out of danger areas until an "all-clear" is issued by competent authority.
- A small tsunami at one point on the shore can be extremely large a few kilometers away. Don't let the modest size of one make you lose respect for all.
- All warnings to the public must be taken very seriously, even if some are for non-destructive events. The tsunami of May 1960 killed 61 people in Hilo, Hawaii because some thought it was just another false alarm.
- All tsunamis like hurricanes are potentially dangerous, even though they may not damage every coastline they strike.
- Never go down to the shore to watch for a tsunami. When you can see the wave you are too close to escape it. Never try to surf a tsunami; most tsunamis are like flash flood full of debris and they do not curl or break like surfing waves.
- Sooner or later, tsunamis visit every coastline in the Pacific and other oceans. If you live in any coastal area, be prepared and know nature's tsunami warning signs.
- During a tsunami emergency, your local civil defense, police, and other emergency organizations will try to save your life. Give them your fullest cooperation.
All eight fire stations in Huntington Beach have warning sirens that will be used in the event of a tsunami. They are tested at noon on the first Friday of each month. When you hear the siren activate at any other time, turn on your AM/FM radio to 107.9 FM and turn your TV to a local LA based station (KCAL, KTLA, etc.) to listen for emergency information.
Stay tuned to your AM/FM radio or television stations during a tsunami emergency. Bulletins issued through the Huntington Beach Emergency Management and Homeland Security Office and NOAA offices can help save your life!
For more information on tsunamis see: