Montreal's STM Blue Line Will Now Be Shut Down Until 4:30 PM – Over Three Hours In Total

Due to a rare power failure, the entire Montreal Blue STM line (from Snowdon to Saint-Michel stations) has shut down.
The STM tweeted the news around 12:50 PM, predicting that the line would again be operational around 1:06 PM.
ALSO READ: Hydro Quebec Wants You To Turn Down Your Heat During The Extreme Cold This Week
Shutdown BLUE line between Snowdon and St-Michel. Power failure. Service expected to resume at 13:06. #stminfo O
Unfortunatetly, the public transit agency pushed back the reopening first to 3:00 PM and now to 4:30 PM. By the time the line reopens, it will have been shut down for over three hours.
Shutdown BLUE line between Snowdon and St-Michel. Power failure. Service expected to resume at 15:00. #stminfo K
Shutdown continues BLUE line between Snowdon and St-Michel. Power failure. Service expected to resume at 15:30. #stminfo Q
Shutdown BLUE line between Snowdon and St-Michel. Power failure. Service expected to resume at 16:30. #stminfo H
A shutdown this long is extremely rare and sure to lead to crowding when the line is again running.
The STM has clarified that the shutdown is actually due to a Hydro Quebec failure. We reported today that, due to the extreme cold, Hydro Quebec has been unable to meet consumer demand, leading to power failures in part of the province. It is unclear whether the Blue line failure is linked to cold temperatures.
Interruption de service prolongée entre les stations Snowdon et Saint-Michel en raison d'une panne d'équipement d'Hydro-Québec. Nous sommes en contact avec leurs équipes afin d'assurer un retour au service le plus rapidement possible. Un service spécial de bus est disponible.
In the meantime, a bus shuttle is running along the Blue line route.
A temporary bus shuttle service is established between Snowdon and Saint-Michel stations. Check the map of your métro station to locate the bus stop of the special bus service : https://t.co/8faMNJG5sm#stminfo
UPDATE: as of 4:35 PM, normal service has resumed on the Blue line.
Normal métro service #stminfo S
Stay tuned for updates on this unusual situation.
This post will be updated with information as it becomes available.