What Triggers a Cold Weather Activation?
Cold weather can create a higher risk of car accidents, hypothermia, frostbite, carbon monoxide poisoning, and heart attacks from overexertion. In certain areas, winter storms can bring extreme cold, freezing rain, snow, ice, and high winds. Santa Clara County has experienced its fair share of extreme cold weather and has opened warming centers throughout the County to provide community members with a warm and safe space to take shelter.
An Cold Weather Activation is triggered when:
- Temperatures with a low of 40 degrees or lower with a probability of rain of at least 5%.
- Cold Watch or Cold Advisory issued by the National Weather Service endanger lives of those living outside.
- Overnight low of 35 degrees or lower for two or more days that would endanger the lives of those living in places not fit for human habitation such as living outside or in vehicles.
- Heavy and continuous rainfall over two or more days that would
- Overnight low of 45 degrees or lower with a probability of rain 50% or higher are certainly triggers for opening Warming Centers.
When weather conditions are within range of the triggers, a member of the CRT will contact the National Weather Service to receive a detailed and current forecast. If conditions warrant, the CRT member will contact the OEM Duty Officer.
For detailed process and procedures for declaring an Cold Weather Activation, you may read the Inclement Weather Annex . You may also find this functional annex on our For Partners page under Emergency Operations Annex.