VICTORIA—Southern British Columbians braced for another severe storm Saturday, with a new set of evacuation alerts issued and officials in an already devastated agricultural community warning of another possible river overflow. Abbotsford Mayor Henry Braun told a news conference Saturday that the city has done everything it can with provincial and federal support to prepare, but the Nooksack River in Washington state presented an “unknown factor.” The river’s dikes in Whatcom County were damaged in recent flooding and it’s unknown exactly how much of Sunday’s anticipated spillover the saturated land could absorb, Braun said. “The rain we can handle, I’m pretty confident of that. What we can’t handle is if the Nooksack overflows and starts emptying again into Sumas Prairie,” he said. The mayor said he impressed the importance of supporting critical diking and drainage infrastructure when he met Friday with Prime Minister Justin Trudeau and Premier John Horgan. “If …