{"id":1787367,"date":"2019-05-21T09:41:42","date_gmt":"2019-05-21T13:41:42","guid":{"rendered":"https:\/\/www.maproomblog.com\/?p=1787367"},"modified":"2019-08-01T13:51:10","modified_gmt":"2019-08-01T17:51:10","slug":"quebec-flood-maps","status":"publish","type":"post","link":"https:\/\/www.maproomblog.com\/2019\/05\/quebec-flood-maps\/","title":{"rendered":"Quebec Flood Maps"},"content":{"rendered":"

In my neck of the woods we’ve been dealing with some pretty severe spring flooding. And as is often the case, existing flood maps are not up to handling the new normal imposed by climate change. Sainte-Marthe-sur-le-Lac, a community near Montreal, was hit hard by flooding this spring, but only two of the 800 flooded homes were in current maps’ flood zones<\/a>. This isn’t an new situation; we had similar floods in 2017. Back then, CBC News reported<\/a> that Montreal-area flood maps’ 20- and 100-year floodplains were exceeded by the then-current flood extent.<\/p>\n

Fast forward to this spring. The flood maps for Montreal-area municipalities have been updated\u2014they’re now based on LIDAR data from 2014 onward\u2014but have not yet made public<\/a>: they\u2019ve yet to be approved by the municipalities or adopted by the province; nonetheless they’ve been put to use during the recent emergency. On the new maps, some 1,500 homes in Sainte-Marthe are part of the flood zone<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

In my neck of the woods we’ve been dealing with some pretty severe spring flooding. And as is often the case, existing flood maps are not up to handling the new normal imposed by climate… More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"link","meta":{"autoblue_enabled":true,"autoblue_custom_message":"","autoblue_shares":[],"autoblue_post_url":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[8],"tags":[131,878,74,701],"class_list":["post-1787367","post","type-post","status-publish","format-link","hentry","category-weather-and-climate","tag-canada","tag-flood-maps","tag-flooding","tag-quebec","post_format-post-format-link"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":1842906,"url":"https:\/\/www.maproomblog.com\/2025\/06\/quebec-flood-maps-will-get-a-new-framework-next-year\/","url_meta":{"origin":1787367,"position":0},"title":"Quebec Flood Maps Will Get a New Framework Next Year","author":"Jonathan Crowe","date":"22 June 2025","format":"link","excerpt":"Gouvernement du Qu\u00e9bec It seems as though the Quebec government has been in the process of updating its flood maps for the better part of the past decade (previously: Quebec\u2019s Updated Flood Maps Prove Controversial; Quebec Flood Maps). But starting next March Quebec\u2019s flood maps will adopt a new framework\u2026","rel":"","context":"In "Weather and Climate"","block_context":{"text":"Weather and Climate","link":"https:\/\/www.maproomblog.com\/category\/weather-and-climate\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/06\/qc-flood-maps-differences.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/06\/qc-flood-maps-differences.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/06\/qc-flood-maps-differences.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/06\/qc-flood-maps-differences.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1787554,"url":"https:\/\/www.maproomblog.com\/2019\/08\/quebecs-updated-flood-maps-prove-controversial\/","url_meta":{"origin":1787367,"position":1},"title":"Quebec’s Updated Flood Maps Prove Controversial","author":"Jonathan Crowe","date":"1 August 2019","format":"link","excerpt":"In the wake of serious and devastating spring flooding in 2017 and 2019, the Quebec government issued proposed flood zone maps that marked areas where rebuilding and new construction would be put on hold. There was immediate pushback: as CBC News reported last month, the maps included substantial areas of\u2026","rel":"","context":"In "Weather and Climate"","block_context":{"text":"Weather and Climate","link":"https:\/\/www.maproomblog.com\/category\/weather-and-climate\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2019\/08\/flood-maps-fort-coulonge-1024x576.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2019\/08\/flood-maps-fort-coulonge-1024x576.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2019\/08\/flood-maps-fort-coulonge-1024x576.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2019\/08\/flood-maps-fort-coulonge-1024x576.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1845072,"url":"https:\/\/www.maproomblog.com\/2025\/10\/why-fema-flood-maps-are-contentious\/","url_meta":{"origin":1787367,"position":2},"title":"Why FEMA Flood Maps Are Contentious","author":"Jonathan Crowe","date":"19 October 2025","format":"link","excerpt":"Two recent articles on the contentiousness that breaks out at the local level when FEMA updates its flood maps. Jordan Wolman\u2019s piece in the Commonwealth Beacon focuses on the disconnect between FEMA\u2019s maps and actual flooding risk in Massachusetts (as has been noted before, FEMA flood maps are based on\u2026","rel":"","context":"In "Weather and Climate"","block_context":{"text":"Weather and Climate","link":"https:\/\/www.maproomblog.com\/category\/weather-and-climate\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":5588,"url":"https:\/\/www.maproomblog.com\/2013\/06\/alberta-flood-maps\/","url_meta":{"origin":1787367,"position":3},"title":"Alberta Flood Maps","author":"Jonathan Crowe","date":"21 June 2013","format":"link","excerpt":"This is a list of maps related to the flooding in southern Alberta (Calgary, Canmore, Bragg Creek, High River, Okotoks, etc.). This list will be added to as needed. Feel free to contribute additional links in the comments. Evacuation zone maps from the City of Calgary, in PDF format. For\u2026","rel":"","context":"In "Disasters"","block_context":{"text":"Disasters","link":"https:\/\/www.maproomblog.com\/category\/disasters\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4692,"url":"https:\/\/www.maproomblog.com\/2017\/08\/fema-flood-maps-dont-account-for-future-sea-level-rise\/","url_meta":{"origin":1787367,"position":4},"title":"FEMA Flood Maps Don’t Account for Future Sea Level Rise","author":"Jonathan Crowe","date":"28 August 2017","format":"link","excerpt":"NPR last month, reporting on a problem with FEMA's flood insurance maps: they're not keeping up with reality. \"FEMA's insurance maps are based on past patterns of flooding. Future sea level rise\u2014which is expected to create new, bigger flood zones\u2014is not factored in.\u00a0So some communities are doing the mapping themselves.\u2026","rel":"","context":"In "Weather and Climate"","block_context":{"text":"Weather and Climate","link":"https:\/\/www.maproomblog.com\/category\/weather-and-climate\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1818804,"url":"https:\/\/www.maproomblog.com\/2023\/09\/the-cbc-on-inaccessible-flood-maps\/","url_meta":{"origin":1787367,"position":5},"title":"The CBC on Inaccessible Flood Maps","author":"Jonathan Crowe","date":"27 September 2023","format":"link","excerpt":"https:\/\/www.youtube.com\/watch?v=2Nciej4VX7M As the CBC\u2019s evening news program The National reports, flood maps can be incredibly hard to find, with even municipal maps requiring an NDA to view in some cases. Now this story focuses on Halifax, Nova Scotia in the wake of flash flooding this summer; the situation elsewhere in\u2026","rel":"","context":"In "Weather and Climate"","block_context":{"text":"Weather and Climate","link":"https:\/\/www.maproomblog.com\/category\/weather-and-climate\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/2Nciej4VX7M\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts\/1787367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/comments?post=1787367"}],"version-history":[{"count":2,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts\/1787367\/revisions"}],"predecessor-version":[{"id":1787369,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts\/1787367\/revisions\/1787369"}],"wp:attachment":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/media?parent=1787367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/categories?post=1787367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/tags?post=1787367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}