Ask the Grid

Stories

Data-driven stories from the US power grid — events like demand peaks and winter storms, told with an interactive map and the numbers behind them.

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RetrospectiveERCOT

Winter Storm Uri: The 2021 Texas Grid Collapse

Winter Storm Uri drove ERCOT demand to an all-time winter peak while more than a thousand generating units froze offline. Walk the four days that nearly took the grid down, in the live data that recorded every hour of it.