How do I prepare for a Severe Storm?

Plan ahead for severe storms is the best way to ensure everyone's safety. You may experience high winds, flash flooding, and multi-day power outages. Be prepared, stay aware of conditions around you, and stay informed to keep you and the people you care about safe. 

Stay informed

  1. Monitor weather updates.
  2. Use official TV, radio, and SMC Alert to get the information you need to be safe. Keep listening for updates. Do not leave your home or where you are staying unless authorities tells you it is safe to do so. If they tell you to evacuate the area, follow their instructions.  


  1. In addition to the preparedness page, fill sand bags to protect your property at the City fill in station. 
  2. Keep storm drains in your neighborhood clear to prevent backups. 
    • Call Half Moon Bay Public Works Maintenance at 650.726.7177 for significant blocking. 
    • After 5pm, call the Sheriff's dispatch at 650.726.8286.
  3. Consider flood insurance if you are in the flood zone - View FEMA's Flood Insurance Rate Maps
    • Regular homeowner's insurance policies usually don't cover flood damage.


  1. Make sure your family and pets are safe - if there is time, move valuable household possessions off the floor.
  2. Be ready to evacuate if directed by emergency personnel.
  3. Avoid flood waters: Six inches of water will reach the bottom of most passenger cars. 
  4. Disable utilities - If your property is in imminent danger of flooding, you may need to shut off your gas and electricity for safety. 
    • Visit PG&E online for information about how to do this. 
    • If you smell natural gas, see downed power lines, or suspect another power-related emergency situation, call 9-1-1 and then call PG&E at 1-800-743-5000. 
    • Do not touch any electrical equipment unless it is in a dry area and you are standing on a piece of dry wood while wearing rubber gloves and rubber soled boots or shoes.
  5. Downed trees 
    • Call the Sheriff’s non-emergency dispatch line at 650-363-4911. 
    • Any life threatening issues should be reported to 9-1-1.

Show All Answers

1. How do I prepare for a Severe Storm?
2. How do I prepare for power outages?
3. How do I prepare for fires?
4. How do I prepare for an earthquake?
5. How do I prepare for a Tsunami?