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California Flooding: Everything You Should Know

California experiences various types of flooding, each with its own unique characteristics and potential for damage. The following are the different types of flooding that can occur within the state.


Flooding is a common occurrence in the state of California, with its extensive coastline, mountains, and urban areas. The state's geography makes it prone to different types of flooding, including riverine, coastal, flash, and urban flooding. Flooding can occur at any time of the year, but it is most common during the winter and spring months when rainfall and snowmelt are at their peak.

To properly combat potential flood threats throughout the state of California, it is important to understand all the factors that are in play. Be aware of the specific types of flooding below, the financial implications, and more. In the end, having the best flood protection solutions on hand is the best way to keep yourself prepared.

Types of Flooding in California:

California experiences various types of flooding, each with its unique characteristics and potential for damage. The following are the different types of flooding that can occur in the state:

  • Riverine Flooding: This type of flooding occurs when rivers and streams overflow their banks, causing damage to homes, businesses, and infrastructure in flood-prone areas. Riverine flooding can occur due to prolonged rainfall or snowmelt.

  • Coastal Flooding: This type of flooding occurs along the coast and is caused by high tides, storm surges, and waves. Coastal flooding can cause damage to beachfront properties, roads, and other infrastructure.

  • Flash Flooding: This type of flooding is caused by heavy rainfall over a short period, overwhelming drainage systems and causing water to accumulate quickly. Flash floods can occur in any part of California, particularly in urban areas with poor drainage systems.

  • Urban Flooding: This type of flooding occurs when water accumulates in urban areas due to the inability of the drainage systems to handle heavy rainfall. Urban flooding can cause damage to homes, businesses, and infrastructure, particularly in low-lying areas.

Time of Year Most Flooding Occurs in California:

Flooding can occur in California at any time of the year, but it is most common during the winter and spring months. The state's rainy season usually begins in November and ends in April, with the heaviest rainfall occurring between December and February. During this period, the snowmelt from the Sierra Nevada mountains also contributes to flooding in the state's central and northern regions.

Financial Damage Flooding in California Causes Each Year:

Flooding in California can cause significant damage to infrastructure, homes, and businesses, resulting in huge financial losses. According to the California Department of Water Resources, the state has experienced over $5 Billion in flood-related damages over the past 10 years. The damage caused by flooding can be both direct and indirect, including property damage, loss of income, and environmental damage.

Best Ways to Prepare for Potential Flooding in California:

Preparing for potential flooding in California is essential to minimize damage and ensure the safety of individuals and communities. The following are some of the best ways to prepare for potential flooding in California:

  • Know Your Flood Risk: Understanding your risk of flooding is essential in preparing for potential flooding. The Federal Emergency Management Agency (FEMA) has a flood map service center that can help you determine your flood risk.

  • Purchase Flood Insurance: Flood insurance is essential to protect your property and assets from flood damage. It's important to note that standard homeowners' insurance policies do not cover flood damage.

  • Create an Emergency Plan: Creating an emergency plan is crucial in case of flooding. The plan should include an evacuation route, a designated meeting place, and a communication plan.

  • Stay Informed: Staying informed about weather conditions and flood warnings is essential in preparing for potential flooding. The National Weather Service provides regular updates on weather conditions and flood warnings.

  • Prepare Your Property: Preparing your property before flooding can help minimize damage. This includes clearing gutters and drains, moving valuables to higher ground, and installing flood barriers. Securing the proper flood protection solutions from a trusted manufacturer will put you in the best position to succeed against potential flood damage.

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Find The Perfect California Flood Solutions with Garrison!

Garrison™️ Flood Control specializes in the manufacturing and installation of flood protection solutions for homes, businesses, and municipalities throughout California. Our purpose is to provide reliable, effective, and affordable flood protection systems that can help mitigate the impact of floods and protect properties and assets.

Garrison Flood Control offers a wide range of flood protection solutions, including flood barriers, flood gates, flood bags, and more. We have established a reputation for delivering high-quality products and exceptional customer service.

Contact Garrison today to speak with a dedicated Flood Specialist who can help in your flood planning and make recommendations of solutions based on your specific protection needs. Early prevention and preparedness put you in the best possible position to succeed against the costly damages of flooding.


Garrison™ Flood Control is a New York-based manufacturer and distributor of a complete line of flood control products. Garrison products contain, divert, and re-route water away from valuable property, equipment, infrastructure, and facilities and help prevent flood damage due to rising water levels.

For additional information about Garrison Flood Control Systems, please call 929-299-2099 or email sales@garrisonflood.com.