What you should know about Grid Alerts

Five things to help you better understand what a Grid Alert is and what it may mean to you.  

Grid Alerts are rare, and when they happen you may have little warning – so having some background information can help you manage one.  

  1. What causes a Grid Alert?
    Grid Alerts happen when factors such as extreme heat or cold, or a shutdown of a generation plant leads to there being more demand for electricity than the system can supply.

  2. What is a rotating outage?  
    To avoid a total shutdown, the Alberta Electricity System Operator (AESO) will ask for the power to be temporarily shut down to specific areas of the province.
  3. How long does a rotating outage last?  
    Rotating outages typically last no longer than 30 minutes. However, it never hurts to be prepared in case it goes longer – see our outage tips.
  4. What can I do to help?  

    Saving energy and reducing demand is the easiest way for homeowners to pitch in. This includes:

    • Turn off unnecessary lights and electrical appliances.
    • Minimize the use of air conditioning/space heaters.
    • Delay the use of major power-consuming appliances such as washers, dryers, and dishwashers until after peak hours.
    • Delay charging electric vehicles.  

  5. Who should I follow for updates?  
    Follow the AESO on X or their RSS feed for information about Grid Alerts. You can also follow ENMAX Power on X for Calgary specific information.