Update, a few panicked minutes later: false alarm. Still no news release from OPG or province-wide phone alert to stand down, but there is this:
Important update: the alert regarding #Pickering Nuclear was sent in error. There is no danger to the public or environment.— Ontario Power Gen (@opg) January 12, 2020
Just as a reminder, you can get potassium iodide pills for free if you live within 50 km of an Ontario nuclear installation. Go to preparetobesafe.ca
I don’t know if I should be including Chalk River in this.
Further update: yup, they retracted it. But a scary wee-waa-wee-waa siren while the text is read in a robot voice is not very reassuring