By David LjunggrenOTTAWA (Reuters) - The heaviest rain to hit the Atlantic Canadian province of Nova Scotia in more than 50 years triggered floods causing "unimaginable" damage, and four people are missing, including two children, officials said on Saturday. Scroll to continue with content Ad ADVERTISEMENT"We have a scary, significant situation," said Nova Scotia Premier Tim Houston, adding that at least seven bridges would have to be replaced or rebuilt. Authorities have declared a state of emergency in Halifax, the largest city in Nova Scotia, and four other regions. The regional municipality in Halifax reported "significant damage to roads and infrastructure" and urged people to stay at home and not use their cars. Early on Saturday, authorities in northern Nova Scotia ordered residents to evacuate amid fears that a dam near the St. Croix River system could breach.
