Big wins, shocking losses, and goodbye to a 46-year mayor: what to know about Ontario's 400+ elections

<img src='https://i.cbc.ca/ais/bf9ee5bf-3e08-4d31-b13f-edb7aaef50ea,1793114637848/full/max/0/default.jpg?im=Crop%2Crect%3D%28976%2C547%2C3773%2C2122%29%3B' alt='A man in a suit and green tie smiles widely as two women surround him.' width='620' height='349' title='Hamilton mayor-elect Keanin Loomis celebrates his win at an election night event in the city Monday.'/><p></p>