BE STORM READY
CRANSTON AND HOLY STORM READY INFORMATION
All residents in burn areas are reminded to be vigilant and prepared to evacuate if public safety officials determine evacuations are necessary. Flooding, mud flows and debris flows can happen at any time.
What is a debris flow?
Debris and mud flows are rivers of rock, earth, and other debris saturated with water. They develop when water rapidly hits the ground during intense rainfall, resulting into a flowing river of mud. They can flow rapidly, striking with little or no warning at extremely quick speeds. They also can travel several miles from their source, growing in size as they pick up trees, boulders, cars and other materials.
A Cranston Flash Flood community meeting was held on Monday, Aug. 27 in Idyllwild to discuss the hazardous conditions on the mountaintop. See event flier.
To view a playback of the meeting, click here.
See below for available presentations from the community meeting:
Cranston Post-Fire Flood Map:
County geologists, flood control experts, and other partners prepared a risk map for impacted mountain residents.
To view the Cranston Post-Fire Flood map, click here.
The map illustrates areas of High Risk and Extreme Risk (see definitions below).
- High risk – These areas are also at risk for flooding and debris flows from waterways, as well as localized falling rocks, mud flows, debris flows and landslides. Properties facing the greatest threat are those near creek channels or steep slopes. Even if not directly impacted, properties in the high-risk areas experience significant impacts, including road closures and disruptions to utilities.
- Extreme risk: - These areas are within known floodplains, flood risk zones or debris risk zones. Properties within these areas are at extreme threat of damage or destruction should a flood, mud or debris flow start in the local streams.
Safety Steps to Prepare:
- Be prepared to leave before roads, creeks and waterways are flowing. This is the safest time to leave before roads are closed. If waterways are already flowing, know where the closest higher ground is located and have a plan to get there.
- Follow all orders by public safety officials. Sign up for emergency alerts at RivCoReady.org/AlertRivCo.
- Monitor weather reports and consider your safety risk when a weather alert is issued. Evacuation warnings (voluntary) will be issued for high and extreme risk areas when the National Weather Service issues a Flash Flood Watch over the Cranston or Holy Fire burn areas. As stated above, the safest time to leave is during an evacuation warning before roads, creeks and waterways are flowing. Mandatory evacuation orders will be issued during Flash Flood Warnings.
- Know all your local access roads and understand that some may be blocked by debris. Have an alternate plan or route. Stay informed of road and highway conditions by visiting the Riverside County Transportation Department's website at rctlma.org/trans and Caltrans' website at quickmap.dot.ca.gov.
- Never drive or walk into flood waters or go around barricades. It is impossible to know how deep the water or mud is just by looking at it.
- Protect your property structures with sandbags and other methods to divert water from entering structures and reduce erosion on your property. Limited and unfilled sandbags are available at your local fire station. Read the County's new Flood Guide for Homeowners to learn about options for protecting your home and property.
- Flood Insurance: Most homeowners insurance does not cover floods from natural disasters. Make sure your home is protected. Refer to the National Flood Insurance Program website. Act now. Most flood insurance policies take up to 30 days to go into effect.
- Have an emergency plan and a disaster kit ready to go. For more information, click here.
In case of emergency, dial 911.