Lake health warning after rain Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Contact the authorby Jacob Traynor January 15, 2021 People should avoid swimming in Lake Colac 48 hours after rain, new signs advise. Unlock full access to Colac Herald - Subscribe today! Subscribe Now Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)