water flood risk derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "lang": "en",
      "state": "TN"
    }
  },
  "output": {
    "type": "json",
    "errors": {
      "400": {
        "example": {
          "error": "invalid request"
        },
        "description": "Invalid or missing parameter(s). Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."
      },
      "402": {
        "description": "Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."
      },
      "500": {
        "example": {
          "error": "upstream_failed"
        },
        "description": "Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."
      }
    },
    "example": {
      "query_summary": {
        "state": "TN",
        "location": "Nashville TN",
        "risk_horizon": "72 hours"
      },
      "risk_assessment": {
        "72h_outlook": "Moderate — 40-60% probability of reaching action stage",
        "current_risk": "Low-Moderate",
        "historical_context": "Cumberland River has exceeded 40 ft (flood stage) 6 times since 2000, including catastrophic 2010 event (51.9 ft)"
      },
      "upstream_factors": {
        "dam_releases": "Army Corps releasing 22,000 cfs at Old Hickory — elevated downstream levels expected",
        "soil_saturation": "High (>85%) — upstream of Cordell Hull Dam",
        "precipitation_72h_in": 2.1
      },
      "property_guidance": {
        "nfip_note": "22% of Nashville flood claims come from outside high-risk zones. Consider coverage if within 1 mile of Cumberland or major tributary.",
        "fema_zones_at_risk": [
          "AE",
          "AO"
        ],
        "preparation_checklist": [
          "Move valuables above ground level",
          "Test sump pump",
          "Locate flood shutoffs",
          "Review NFIP policy limits"
        ]
      },
      "current_conditions": {
        "stage_ft": 28.4,
        "condition": "Below action stage — monitoring recommended",
        "primary_river": "Cumberland River",
        "flood_stage_ft": 40,
        "action_stage_ft": 30,
        "pct_of_flood_stage": 71
      }
    }
  }
}