Active AlertsE W Farr Memorial Public School, ON

Cover up plants, especially those in frost-prone areas. Take preventative measures to protect frost-sensitive plants and trees.

Some plants may be damaged or even destroyed by frost.

Widespread frost is expected tonight into early Thursday morning as temperatures drop below the freezing mark. Frost may return Thursday night.

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Frost advisories are issued when temperatures are expected to reach the freezing mark during the growing season, leading to potential damage and destruction to plants and crops.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.