Hydro One spokesperson MaryLeanna Stea has told CP24 that the utility has no identifiable cause for tonight’s widespread series of blackouts. Earlier unconfirmed reports said that a fire was the cause. Speaking live (not in replay) at about 11 p.m. Ms.Stea said crews are out looking but that Hydro One has not been able to identify what disrupted things so seriously. She said engineers understand there was a problem in the “west-end transmission system” but that they have been unable to determine a specific cause in the form of a fire, flood or other for the malfunction. Ms. Stea was pressed on the question of cause and said she knew only that crews were hunting the cause This leaves open that question but also just how power has been restored. It may be too early to guess as how much Hydro One and Toronto Hydro know about how the lights came back on. And the viability of the power flow at present. Another spokesperson for Hydro One seemed to hedge his response when asked about further possible failures.