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.

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.

Severe weather warnings and watches were issued for parts of southern Ontario Wednesday afternoon. Just after 2:30 p.m., Environment Canada said meteorologists were tracking a severe thunderstorm capable of producing up to nickel-sized hail and heavy rain.

A muggy airmass draped over southern Ontario heading into this weekend will set the stage for a multi-day risk for strong to severe thunderstorms across the region. We’ll see the potential for storms to build each day Friday, Saturday, and Sunday. Some of the storms could turn severe with strong winds and heavy rainfall.

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.

A tornado warning has been issued for several municipalities in eastern Ontario. Shortly before 3:30 p.m. this afternoon, Environment Canada announced that a warning is in effect for Merrickville-Wolford-Kemptville,

5:10 p.m. EDT - Severe thunderstorms prompted a tornado warning in northern Ontario on Saturday afternoon.. Environment and Climate Change Canada issued a tornado warning for the following areas ...

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.