Ontario Power Generation says there are normally between 100 and 200 orders per month.
OPG says there were 32,388 orders placed between Sunday and Monday.
An alert Sunday morning warning of an unspecified problem at the nuclear facility was sent in error to cellphones, radios and TVs across the province.
People living within 50 kilometers of a nuclear facility can order the potassium iodide (KI) pills through a website called preparetobesafe.ca.
The pills help protect the thyroid gland and reduce the risk of cancer if radioactive iodine is released into the air.
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