"red flag warning" meaning in English

{
  "forms": [
    {
      "form": "red flag warnings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "red flag warning (plural red flag warnings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Meteorology",
          "orig": "en:Meteorology",
          "parents": [
            "Atmosphere",
            "Earth sciences",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2014, Jeffery Sims, The No-Nonsense Guide to Heat Wave, Drought, & Hot Weather Safety:",
          "text": "During red flag warnings, firefighting agencies will alter their staffing and equipment resources dramatically to accommodate the increased forecast risk.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A warning issued by the United States National Weather Service that conditions are ideal for wildfires."
      ],
      "id": "en-red_flag_warning-en-noun-6pQ5AW2Z",
      "links": [
        [
          "meteorology",
          "meteorology"
        ],
        [
          "wildfire",
          "wildfire"
        ]
      ],
      "raw_glosses": [
        "(meteorology, US) A warning issued by the United States National Weather Service that conditions are ideal for wildfires."
      ],
      "tags": [
        "US"
      ],
      "topics": [
        "climatology",
        "meteorology",
        "natural-sciences"
      ]
    }
  ],
  "word": "red flag warning"
}

{
  "forms": [
    {
      "form": "red flag warnings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "red flag warning (plural red flag warnings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Meteorology"
      ],
      "examples": [
        {
          "ref": "2014, Jeffery Sims, The No-Nonsense Guide to Heat Wave, Drought, & Hot Weather Safety:",
          "text": "During red flag warnings, firefighting agencies will alter their staffing and equipment resources dramatically to accommodate the increased forecast risk.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A warning issued by the United States National Weather Service that conditions are ideal for wildfires."
      ],
      "links": [
        [
          "meteorology",
          "meteorology"
        ],
        [
          "wildfire",
          "wildfire"
        ]
      ],
      "raw_glosses": [
        "(meteorology, US) A warning issued by the United States National Weather Service that conditions are ideal for wildfires."
      ],
      "tags": [
        "US"
      ],
      "topics": [
        "climatology",
        "meteorology",
        "natural-sciences"
      ]
    }
  ],
  "word": "red flag warning"
}