{"id":5701,"date":"2026-02-11T00:33:14","date_gmt":"2026-02-11T00:33:14","guid":{"rendered":"https:\/\/infos-media-nantes.fr\/?p=5701"},"modified":"2026-02-11T00:33:15","modified_gmt":"2026-02-11T00:33:15","slug":"sevres-nantaise-vigilance-orange-crue-fevrier","status":"publish","type":"post","link":"https:\/\/infos-media-nantes.fr\/sevres-nantaise-vigilance-orange-crue-fevrier\/","title":{"rendered":"Crues en Loire-Atlantique : l\u2019aval de la S\u00e8vre nantaise plac\u00e9 en vigilance orange"},"content":{"rendered":"\n<article>\n  <header>\n \n    <p>M\u00e9t\u00e9o France a d\u00e9clench\u00e9 ce mardi 10 f\u00e9vrier, \u00e0 16 h, une vigilance orange crue pour l\u2019aval de la S\u00e8vre nantaise en Loire-Atlantique. Le cours d\u2019eau, qui prend sa source \u00e0 Gorges et rejoint la Loire \u00e0 Pirmil au sud de Nantes, conna\u00eet une mont\u00e9e des eaux li\u00e9e aux fortes pluies persistantes. Le d\u00e9partement reste par ailleurs en vigilance jaune pour les pluies, orages et inondations.<\/p>\n  <\/header>\n\n  <section>\n    <p>L\u2019amont de la S\u00e8vre nantaise, situ\u00e9 en Vend\u00e9e, \u00e9tait d\u00e9j\u00e0 plac\u00e9 en vigilance orange. Cette alerte est d\u00e9sormais \u00e9tendue au tron\u00e7on aval, entre Gorges et Nantes. Selon M\u00e9t\u00e9o France, le d\u00e9bit du fleuve c\u00f4tier devrait augmenter de fa\u00e7on significative dans les prochaines heures. Les pr\u00e9cipitations continues observ\u00e9es depuis plusieurs semaines saturent les sols et favorisent cette hausse.<\/p>\n\n    <p>Cette situation s\u2019inscrit dans un contexte m\u00e9t\u00e9orologique d\u00e9grad\u00e9 sur l\u2019ensemble du d\u00e9partement. Des \u00e9pisodes pluvieux r\u00e9p\u00e9t\u00e9s ont d\u00e9j\u00e0 entra\u00een\u00e9 des niveaux d\u2019eau \u00e9lev\u00e9s dans plusieurs bassins versants. Les services de pr\u00e9vision hydrologique surveillent \u00e9troitement l\u2019\u00e9volution de la crue, en lien avec les collectivit\u00e9s locales.<\/p>\n\n    <p>La configuration hydrographique complique l\u2019\u00e9coulement des eaux. La Loire, elle aussi, devrait conna\u00eetre une mont\u00e9e en d\u00e9but de semaine prochaine. Si la S\u00e8vre nantaise d\u00e9borde encore ce week-end, l\u2019\u00e9vacuation des eaux vers l\u2019estuaire sera plus difficile \u00e0 partir du mardi 17 f\u00e9vrier. Ce ph\u00e9nom\u00e8ne de concomitance des crues augmente le risque d\u2019inondation localis\u00e9e.<\/p>\n  <\/section>\n\n  <section>\n    <h2>Des secteurs potentiellement expos\u00e9s<\/h2>\n    <p>Les communes riveraines de la S\u00e8vre nantaise sont les plus concern\u00e9es. Les zones basses, les berges am\u00e9nag\u00e9es et les espaces proches du lit mineur pourraient \u00eatre impact\u00e9s. Les autorit\u00e9s recommandent d\u2019\u00e9viter toute activit\u00e9 \u00e0 proximit\u00e9 imm\u00e9diate du cours d\u2019eau.<\/p>\n\n    <p>Les services municipaux et d\u00e9partementaux ont activ\u00e9 leurs dispositifs de vigilance. Des patrouilles peuvent \u00eatre d\u00e9ploy\u00e9es pour surveiller les points sensibles. Les habitants sont invit\u00e9s \u00e0 consulter r\u00e9guli\u00e8rement les bulletins officiels et \u00e0 respecter les consignes de s\u00e9curit\u00e9.<\/p>\n\n    <p>En cas de d\u00e9bordement, des coupures de routes secondaires restent possibles. Les \u00e9quipements situ\u00e9s en bord de rivi\u00e8re, tels que pontons, passerelles ou chemins pi\u00e9tons, pourraient \u00eatre temporairement ferm\u00e9s. La priorit\u00e9 reste la protection des personnes et des biens.<\/p>\n  <\/section>\n\n  <section>\n    <h2>Pourquoi cette crue est surveill\u00e9e<\/h2>\n    <p>La S\u00e8vre nantaise r\u00e9agit rapidement aux \u00e9pisodes pluvieux intenses. Son bassin versant, fortement arros\u00e9 ces derni\u00e8res semaines, atteint un niveau de saturation \u00e9lev\u00e9. Cette caract\u00e9ristique explique la r\u00e9activit\u00e9 du cours d\u2019eau face aux nouvelles pr\u00e9cipitations.<\/p>\n\n    <p>L\u2019interaction avec la Loire constitue un second facteur de vigilance. Lorsque le grand fleuve est haut, il freine l\u2019\u00e9coulement des affluents. Ce blocage naturel peut provoquer une \u00e9l\u00e9vation plus marqu\u00e9e des niveaux en amont, notamment autour de Nantes.<\/p>\n\n    <p>M\u00e9t\u00e9o France continuera d\u2019actualiser ses bulletins au fil des observations. Toute \u00e9volution significative, \u00e0 la hausse comme \u00e0 la baisse, sera communiqu\u00e9e aux autorit\u00e9s locales et au public.<\/p>\n  <\/section>\n\n  <!-- Mini-jeu officiel IMN : Memory 6x6 (36 cartes, 18 paires), mobile-first, centr\u00e9, tracking -->\n  <section class=\"imn-mem6x6-wrapper\">\n    <h2>Memory des rivi\u00e8res<\/h2>\n    <div class=\"imn-mem6x6-stats\">\n      Coups : <span id=\"imn-mem6x6-moves\">0<\/span> | Temps : <span id=\"imn-mem6x6-timer\">0<\/span>s\n    <\/div>\n    <div id=\"imn-mem6x6-container\">\n      <div id=\"imn-mem6x6-grid\"><\/div>\n    <\/div>\n    <button class=\"imn-btn\" id=\"imn-mem6x6-restart\">Rejouer<\/button>\n  <\/section>\n\n  <style>\n    article a { color:#5532F0; font-weight:bold; text-decoration:underline; }\n\n    .imn-mem6x6-wrapper{\n      display:flex;\n      flex-direction:column;\n      align-items:center;\n      justify-content:center;\n      margin:30px auto;\n      text-align:center;\n      width:100%;\n    }\n\n    #imn-mem6x6-container{\n      display:flex;\n      justify-content:center;\n      width:100%;\n    }\n\n    #imn-mem6x6-grid{\n      display:inline-grid;\n      grid-template-columns:repeat(6, 1fr);\n      gap:6px;\n      width:min(92vw, 420px);\n      margin:auto !important;\n      justify-content:center;\n      align-content:center;\n    }\n\n    .imn-mem6x6-card{\n      aspect-ratio:1\/1;\n      font-size:clamp(28px, 6vw, 40px);\n      display:flex;\n      align-items:center;\n      justify-content:center;\n      background:#f5f5f5;\n      border-radius:12px;\n      cursor:pointer;\n      user-select:none;\n      transition:transform .25s;\n      border:1px solid #ddd;\n    }\n\n    .imn-mem6x6-card.flipped{ background:white; 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Le cours d\u2019eau, qui prend sa source \u00e0 Gorges et rejoint la Loire \u00e0 Pirmil au sud de Nantes, conna\u00eet une mont\u00e9e des eaux li\u00e9e aux fortes pluies persistantes. Le d\u00e9partement reste [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5702,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":"","event_start_date":"","event_end_date":"","event_location":"","imn_event_city":"","imn_event_start_time":"","imn_event_end_time":"","imn_event_all_day":"","imn_event_address":"","imn_event_ticket_url":"","imn_event_price":"","imn_event_status":"","imn_event_organizer":"","imn_event_accessibility":""},"categories":[22],"tags":[2211,2210,7,25,5,4099,3340],"class_list":["post-5701","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-nantes","tag-crue","tag-inondations","tag-loire-atlantique","tag-meteo","tag-nantes","tag-sevre-nantaise","tag-vigilance-orange"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Crues en Loire-Atlantique : l\u2019aval de la S\u00e8vre nantaise plac\u00e9 en vigilance orange - 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