Health impacts from extreme precipitation events may include:
- Exposure to waterborne diseases via sewage-contaminated water.
- Skin and lung infections due to increased mold growth in moist conditions.
- Vector-borne diseases due to more widespread mosquito growth in standing water.
- Emotional and psychological trauma due to a hazard event or post-event conditions.
To support local jurisdictions and communities to plan for flooding events, Climate Ready SMC commissioned traffic modeling for flooding scenarios. The below impacts and adaptation strategies were included in the resulting study.
Transportation impacts from flooding may include:
- Flooded underpasses limiting access to and from highways.
- Traffic delays countywide, particularly if one of the points of access to the Coast, or other major arteries, are impacted by a large flood.
- Delays in evacuation and emergency response due to flooding and traffic congestion.
Possible Adaptation Strategies
Policy and Communication Strategies
- Develop funding and finance mechanisms to help vulnerable communities elevate or adapt homes, buildings, and businesses in flood-prone areas.
- Create incentive programs to reinforce structures and homes to minimize flood damage.
- Provide improved communication and education to the public of evacuation procedures and routes.
- Support microgrids for communications, water, and power.
- Provide early and continuous multilingual real-time communication during a flood event of current roadway status and alternative route delays. This can include a resilient communication chain that includes schools, community centers, and common destinations like corner stores.
Transportation and Flooding Strategies
- Install green infrastructure that also addresses flooding hazards.
- Install porous roadways.
- Increase the capacity of local alternative routes to lessen delays for the entire transportation network.
- Harden infrastructure vulnerable to flooding events with stronger foundations and enhanced stormwater management facilities.
- Improve drainage systems through capacity expansion and expand pumping of underpasses and tunnels and elevation of low-lying road and rail infrastructure.