Some power companies are integrating with your smart thermostat and may pre-cool in some case. Example, APS in Arizona... --- During an event, how will my thermostat be adjusted?  At the start of an event, your thermostat temperature will be automatically adjusted up a few degrees above the current temperature.  Each event will typically last an average of 2 hours, and will typically occur between 3 p.m. and 8 p.m. Events typically will not occur on holidays.  In some cases, your thermostat temperature may be adjusted down a few degrees prior to the event to pre-cool the home and ensure your comfort during an event.  Once the event is over, your thermostat will return to its normal set point and/or schedule.