<br /> <p>Parts of the Paris underground system were flooded</a> on Sunday, July 9, after record levels</a> of rain and thunderstorms in the city. The worst-affected areas were the 13th and 15th arrondissements, with an estimated 20 metro stations hit by flooding.</p><p>Here, a cascade of water is seen pouring into a stop along Avenue de la Republique. Credit: Facebook/Loulou Lewis Hammachi via Storyful</p><br />