{ "id": "ev-9386", "slug": "heat-wave-mn-2025-12-13", "title": "Heat wave in Mongolia and 3 other countries, 13 to 24 December 2025", "type": "heat_wave", "status": "closed", "start": "2025-12-13", "end": "2025-12-24", "peakDay": "2025-12-17", "countries": [ "MN", "CN", "KZ", "RU" ], "footprint": { "type": "Polygon", "coordinates": [ [ [ 78.35, 50.87 ], [ 105.23, 27.3 ], [ 114.97, 27.12 ], [ 123.52, 41.73 ], [ 124.33, 43.18 ], [ 125.32, 46.38 ], [ 99.67, 51.12 ], [ 80.77, 53.27 ], [ 78.35, 50.87 ] ] ] }, "counts": { "byType": { "tmax_high": 11, "tmin_high": 135 } }, "dailyCounts": [ { "date": "2025-12-13", "n": 1 }, { "date": "2025-12-14", "n": 10 }, { "date": "2025-12-15", "n": 18 }, { "date": "2025-12-16", "n": 23 }, { "date": "2025-12-17", "n": 26 }, { "date": "2025-12-18", "n": 24 }, { "date": "2025-12-19", "n": 19 }, { "date": "2025-12-21", "n": 8 }, { "date": "2025-12-22", "n": 12 }, { "date": "2025-12-23", "n": 3 }, { "date": "2025-12-24", "n": 2 } ], "top": [ { "id": 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{ "id": "ev-10230", "slug": "heat-wave-us-2026-01-28", "title": "Heat wave in United States, 28 January to 24 February 2026", "type": "heat_wave", "status": "closed", "start": "2026-01-28", "end": "2026-02-24", "peakDay": "2026-02-05", "countries": [ "US" ], "recordCount": 6528, "stationCount": 2723, "maxSignificance": 55 }, { "id": "ev-2897", "slug": "heat-wave-us-2020-05-24", "title": "Heat wave in United States and Mexico, 24 May to 19 June 2020", "type": "heat_wave", "status": "closed", "start": "2020-05-24", "end": "2020-06-19", "peakDay": "2020-05-30", "countries": [ "US", "MX" ], "recordCount": 5047, "stationCount": 2215, "maxSignificance": 77 }, { "id": "ev-4153", "slug": "heat-wave-us-2021-03-26", "title": "Heat wave in United States and Mexico, 26 March to 17 April 2021", "type": "heat_wave", "status": "closed", "start": "2021-03-26", "end": "2021-04-17", "peakDay": "2021-04-04", "countries": [ "US", "MX" ], "recordCount": 3669, "stationCount": 1733, "maxSignificance": 59 }, { "id": "ev-4365", "slug": "heat-wave-de-2021-12-18", "title": "Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 2022", "type": "heat_wave", "status": "closed", "start": "2021-12-18", "end": "2022-01-15", "peakDay": "2021-12-31", "countries": [ "DE", "ES", "GB", "FR", "NL", "RO", "UA", "IT", "SI", "RU", "HR", "PL", "TR", "MA", "CH", "DZ", "SE", "SA", "AT", "CZ", "HU", "NO", "IE", "BG", "BY", "ME", "PT", "AZ", "KZ", "RS", "SK", "LY", "SY", "BE", "TN", "DK", "GE", "GI", "IR", "KW", "AM", "BH", "CY", "GR", "JO", "LU", "MD", "MK", "MT", "QA" ], "recordCount": 3626, "stationCount": 834, "maxSignificance": 53 } ], "asOf": "2026-10-17T00:00:00Z", "revised": "2026-10-17", "records": [ { "id": "RSM00029827-2025-12-13-tmax_high-daily", "stationId": "RSM00029827", "stationName": "Baevo", "countryIso2": "RU", "type": "tmax_high", "timescale": "daily", "date": "2025-12-13", "value": -0.3, "unit": "c", "prevValue": -0.4, "prevDate": "2006-12-13", "margin": 0.1, 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