The first explosions of the annual Loto-Quebec International Fireworks Competition in Montreal will sound from La Ronde on Thursday night at 10 p.m. Drivers and residents in the Longueuil and Montreal areas nearby should be aware that roads, including the Jacques-Cartier Bridge, will close starting at 8 p.m. and reopen at midnight. Here are the dates, countries and themes of this year’s competition: Visit Quebec511.info for more details on exact road closures.