A tornado warning has been issued for Savant Lake and Sturgeon Lake in northwestern Ontario. Here's the latest from Environment and Climate Change Canada on how to stay safe.

A line of severe thunderstorms crossed the border and made a mess in southwestern Ontario on Saturday, blocking streets with downed trees and knocking out power to thousands. The storms pushed through Windsor around 1:30 to 2:00 p.m. local time, arriving with strong wind gusts and heavy rainfall.

The Sudbury area is under a severe thunderstorm watch that could produce severe wind gusts, a tornado and heavy rain. Environment Canada said Saturday that wind gusts up to 110 km/hr, heavy downpours, and an isolated tornado are all possible this afternoon and into this evening.

Summer in Ontario may bring with it warm weather, but last week's tornado in Lucan is a reminder that it’s also tornado season.

Environment Canada's tornado warning for eastern Ontario has ended. From about 3:20 until 4 p.m. the agency said a severe thunderstorm could possibly produce a tornado in communities such as Kemptville and Merrickville. It's not yet known if a tornado formed.

Severe weather moves east from southern Ontario with raised instability threat throughout eastern Ontario and southern Quebec. Meteorologist Laura Power has the details.

PHELPS, N.Y. – The National Weather Service confirmed that an EF2 tornado touched down in the Town of Phelps in Ontario County on Monday.

Severe weather researchers say a weak tornado touched down in a community north of London, Ont., on Monday afternoon.

Following a string of severe emergencies across Ontario County, Board of Supervisors Chair Jared Simpson has issued a public statement recognizing the extraordinary efforts of local first responders.