{"id":16681,"date":"2026-05-20T03:27:35","date_gmt":"2026-05-20T07:27:35","guid":{"rendered":"https:\/\/batisseurs-outremer.com\/?p=16681"},"modified":"2026-05-20T03:27:35","modified_gmt":"2026-05-20T07:27:35","slug":"cyclones-seismes-submersion-les-contraintes-qui-redefinissent-la-construction-a-mayotte","status":"publish","type":"post","link":"https:\/\/batisseurs-outremer.com\/en\/cyclones-seismes-submersion-les-contraintes-qui-redefinissent-la-construction-a-mayotte\/","title":{"rendered":"Cyclones, s\u00e9ismes, submersion : les contraintes qui red\u00e9finissent la construction \u00e0 MAYOTTE"},"content":{"rendered":"<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"\" data-turn-id-container=\"request-WEB:1e971c0d-8689-4f79-8566-7afaf78b5d1d-45\" data-is-intersecting=\"true\">\n<div class=\"relative w-full overflow-visible\">\n<section class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:1e971c0d-8689-4f79-8566-7afaf78b5d1d-45\" data-turn-id-container=\"request-WEB:1e971c0d-8689-4f79-8566-7afaf78b5d1d-45\" data-testid=\"conversation-turn-12\" data-scroll-anchor=\"false\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1\" dir=\"auto\" tabindex=\"0\" data-message-author-role=\"assistant\" data-message-id=\"00887eba-fcbd-4330-8986-fafdefc7034e\" data-message-model-slug=\"gpt-5-5\" data-turn-start-message=\"true\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\">\n<p data-start=\"79\" data-end=\"423\">Le territoire mahorais fait face \u00e0 une accumulation de risques naturels qui p\u00e8sent directement sur l\u2019am\u00e9nagement et les projets de construction. Cyclones, s\u00e9ismes, mouvements de terrain, submersion marine ou encore recul du trait de c\u00f4te : ces al\u00e9as structurent d\u00e9sormais une grande partie des r\u00e9flexions autour du b\u00e2ti et de l\u2019urbanisme local.<\/p>\n<p data-start=\"425\" data-end=\"870\">C\u2019est pr\u00e9cis\u00e9ment le sujet du premier \u00e9pisode de la s\u00e9rie vid\u00e9o <em><strong>\u00ab Construire en zone \u00e0 risques \u00e0 Mayotte \u00bb<\/strong><\/em>, <em>lanc\u00e9e par le <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">CAUE de Mayotte<\/span><\/span><\/em> et <em>l\u2019<span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Association fran\u00e7aise pour la pr\u00e9vention des catastrophes naturelles et technologiques (AFPCNT)<\/span><\/span><\/em>. Cette premi\u00e8re vid\u00e9o p\u00e9dagogique revient sur les principaux risques dits <em><strong>\u00ab naturels \u00bb<\/strong><\/em> pr\u00e9sents sur l\u2019\u00eele et sur les outils permettant de mieux anticiper les contraintes avant tout projet de construction.<\/p>\n<p data-start=\"872\" data-end=\"1355\">Le sujet s\u2019inscrit dans un contexte encore marqu\u00e9 par plusieurs \u00e9v\u00e9nements r\u00e9cents. La vid\u00e9o rappelle notamment le passage du cyclone tropical intense CHIDO en d\u00e9cembre 2024, celui de la temp\u00eate tropicale Dikeledi en janvier 2025, ainsi que la s\u00e9rie de s\u00e9ismes ayant touch\u00e9 Mayotte depuis 2018. Ces \u00e9pisodes ont remis en lumi\u00e8re la vuln\u00e9rabilit\u00e9 du territoire et la n\u00e9cessit\u00e9 d\u2019adapter davantage les pratiques constructives aux r\u00e9alit\u00e9s locales.<\/p>\n<h2 data-section-id=\"1j6okcj\" data-start=\"1357\" data-end=\"1405\"><strong>Une exposition g\u00e9n\u00e9ralis\u00e9e aux al\u00e9as naturels<\/strong><\/h2>\n<p data-start=\"1407\" data-end=\"1789\">Le premier enseignement mis en avant concerne l\u2019ampleur de l\u2019exposition du territoire. Selon les informations pr\u00e9sent\u00e9es dans la vid\u00e9o, <em>moins de 10 % du territoire mahorais ne comporte pas d\u2019al\u00e9as localis\u00e9s.<\/em> Autrement dit, la quasi-totalit\u00e9 de l\u2019\u00eele est concern\u00e9e par au moins une contrainte naturelle n\u00e9cessitant des pr\u00e9cautions particuli\u00e8res.<\/p>\n<p data-start=\"1791\" data-end=\"2213\">La vid\u00e9o distingue plusieurs types d\u2019al\u00e9as pr\u00e9sents \u00e0 Mayotte. Parmi eux figurent les risques cycloniques et sismiques, qui concernent l\u2019ensemble du territoire, mais aussi des risques plus localis\u00e9s comme les glissements de terrain, les chutes de blocs, les inondations par d\u00e9bordement de cours d\u2019eau, le ruissellement urbain, la submersion marine ou encore le recul du trait de c\u00f4te.<\/p>\n<p data-start=\"2215\" data-end=\"2567\">Le document rappelle \u00e9galement qu\u2019un risque ne d\u00e9pend pas uniquement de l\u2019al\u00e9a lui-m\u00eame, mais aussi de la vuln\u00e9rabilit\u00e9 des populations et des constructions expos\u00e9es. Un b\u00e2ti fragilis\u00e9, des mat\u00e9riaux inadapt\u00e9s ou des situations de pr\u00e9carit\u00e9 peuvent ainsi aggraver fortement les cons\u00e9quences d\u2019un \u00e9v\u00e9nement naturel.<\/p>\n<h2 data-section-id=\"veyc7x\" data-start=\"2569\" data-end=\"2623\"><strong>Urbanisme, foncier et construction sous contraintes<\/strong><\/h2>\n<p data-start=\"2625\" data-end=\"3002\">Au-del\u00e0 du volet p\u00e9dagogique, la vid\u00e9o met en \u00e9vidence les implications tr\u00e8s concr\u00e8tes pour les projets immobiliers et d\u2019am\u00e9nagement. Avant toute op\u00e9ration d\u2019achat ou de construction, les porteurs de projets sont invit\u00e9s \u00e0 consulter plusieurs outils r\u00e9glementaires et techniques afin d\u2019\u00e9valuer l\u2019exposition du terrain aux diff\u00e9rents al\u00e9as.<\/p>\n<p data-start=\"3004\" data-end=\"3050\">Parmi les documents cit\u00e9s figurent notamment :<\/p>\n<ul>\n<li><em>les DICRIM (documents d\u2019information communale sur les risques majeurs) ;<\/em><\/li>\n<li data-section-id=\"1g80r00\" data-start=\"3126\" data-end=\"3148\"><em>les cartes d\u2019al\u00e9as ;<\/em><\/li>\n<li data-section-id=\"fq7r4w\" data-start=\"3149\" data-end=\"3181\"><em>les plans locaux d\u2019urbanisme (PLU) ;<\/em><\/li>\n<li data-section-id=\"1pa85m4\" data-start=\"3182\" data-end=\"3230\"><em>les plans de pr\u00e9vention des risques naturels ;<\/em><\/li>\n<li data-section-id=\"pdhw3l\" data-start=\"3231\" data-end=\"3318\"><em>les certificats d\u2019urbanisme d\u00e9livr\u00e9s en mairie.<\/em><\/li>\n<\/ul>\n<p data-start=\"3320\" data-end=\"3694\">La vid\u00e9o rappelle aussi que certaines zones restent soumises \u00e0 des prescriptions constructives sp\u00e9cifiques, m\u00eame lorsque les al\u00e9as sont consid\u00e9r\u00e9s comme faibles ou mod\u00e9r\u00e9s. \u00c0 l\u2019inverse, les secteurs expos\u00e9s \u00e0 des al\u00e9as forts sont consid\u00e9r\u00e9s comme inconstructibles, notamment \u00e0 proximit\u00e9 des ravines ou de certaines portions du littoral.<\/p>\n<p data-start=\"3696\" data-end=\"4027\">Autre donn\u00e9e importante pour les professionnels du b\u00e2timent : <strong><em>Mayotte est int\u00e9gralement class\u00e9e en zone sismique de niveau 3<\/em><\/strong>, correspondant \u00e0 un al\u00e9a mod\u00e9r\u00e9. M\u00eame en l\u2019absence d\u2019al\u00e9as localis\u00e9s, les constructions doivent donc int\u00e9grer des exigences parasismiques et paracycloniques adapt\u00e9es.<\/p>\n<p data-start=\"4029\" data-end=\"4402\" data-is-last-node=\"\" data-is-only-node=\"\">\u00c0 travers cette premi\u00e8re vid\u00e9o, le <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">CAUE de Mayotte<\/span><\/span> et l&rsquo;AFPCNT\u00a0mettent ainsi en avant une r\u00e9alit\u00e9 d\u00e9sormais incontournable pour le territoire : \u00e0 Mayotte, la r\u00e9silience du b\u00e2ti et la prise en compte des risques naturels deviennent progressivement des conditions centrales de l\u2019am\u00e9nagement et du d\u00e9veloppement urbain.<\/p>\n<hr \/>\n<p><iframe loading=\"lazy\" title=\"Construire en zone \u00e0 risques \u00e0 Mayotte - 1. Conna\u00eetre les risques dits &quot;naturels&quot;\" src=\"https:\/\/www.youtube.com\/embed\/Aylo00s1KLc\" width=\"1468\" height=\"545\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Le territoire mahorais fait face \u00e0 une accumulation de risques naturels qui p\u00e8sent directement sur l\u2019am\u00e9nagement et les projets de construction. Cyclones, s\u00e9ismes, mouvements de terrain, submersion marine ou encore recul du trait de c\u00f4te : ces al\u00e9as structurent d\u00e9sormais une grande partie des r\u00e9flexions autour du b\u00e2ti et de l\u2019urbanisme local. C\u2019est pr\u00e9cis\u00e9ment le [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":16688,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[958],"tags":[],"class_list":["post-16681","post","type-post","status-publish","format-standard","has-post-thumbnail","category-mayotte"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Le territoire mahorais fait face \u00e0 une accumulation de risques naturels qui p\u00e8sent directement sur l\u2019am\u00e9nagement et les projets de construction. 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