1986 Flood Archive

Revised by av & sc, July 2003
1986 Global Register of Extreme Flood Events
DFO # Location Detailed Locations Began
(mm/dd/yy)
Ended
(mm/dd/yy)
Duration
(days)
Dead Displaced Damage
(USD)

Main Cause
Secondary
cause
Recurrence
Interval
(Anecdotal)
Severity
Class*
Hectares
Flooded
Hayden
Code
Affected
Region
(sq km)
Flood
Magnitude**
                                 
1986-047 Southwestern Brazil  States: Rio de Janeiro, Sao Paulo, Minas Gerais. Cities: Copacabana, Rio de Janeiro  12/23/86 01/01/87 10 29 7,000   Brief torrential rain See notes   1    Tpo 275,500                12.1
1986-046 Vietnam Central Vietnam -  Provninces: Nghia Binh, Phu Khanh, Quang Nam Da Nang, Thuan Hai a Gialai-Kontum. 12/03/86 12/05/86 3 165     Heavy rain     1 10,000  Tpz 49,610                  2.4
1986-045 Southwest Iran  Provinces: Shiraz, Bushehr, Khuzestan, Buir Ahmad. Izeh in the Zagros Mountains, Behbahan, Shahruj, Masjid Sulaiman.  11/30/86 12/11/86 12 200 40,000   Heavy rain See notes   1    Cs 155,900                  9.8
1986-044 US West  Western Washington - Lewis, King, Skagit, a Whatcom counties. Towns: Snoqualmie, Glacier. Rivers: Skykomish, Snohomish, Skagit a Puyallup, Boulder Creek 11/23/86 11/26/86 4 0 2,000   Rain and snowmelt   Worst flooding since 1959  2    Cp 26,880                  4.5
1986-043 Ionesia   Southern Sumatra - Bengkulu a Lampung provinces. Central Java - 23 villages 10/27/86 11/03/86 8 93 31,000 $12,800,000 Heavy rain See notes Worst in the history of Lampung Province 3    Tpz 79,460                17.6
1986-042 Haiti  La Gonave Isla off Haiti's west coast  10/23/86 10/25/86 3 40 901   Heavy rain     1    Tpo 1,153                  0.4
1986-041 Alaska  Areas north a south of Anchorage, Talkeetna, Seward, Matanuska-Susitna Borough, Cordova a Willow. Montana a Sheep creeks  10/09/86 10/15/86 7 0 1,500 $20,000,000 Heavy rain     1    CSs** 43,700                  4.1
1986-040  Philippines Luzon Isla - Manila a surrouing provinces  10/06/86 10/07/86 2 18 60,000   Heavy rain     1    Tpo 24,920                  1.1
1986-039  Tunisia Cap Bon region of northern Tunisia: Tunis, Governorates of Tunis, Ben Arous, Ariana, Zaghouan, Nabeul, Kairouan, Kasserine, Bizerte, Beja, Jeouba 09/30/86 10/03/86 4 20 500   Brief torrential rain     1    TsuCs 12,640                  1.6
1986-038 US Midwest  Illinois - Lake a northern Cook counties. Chicago's nothern suburbs; Grafton, East St. Louis. Rivers: Des Plaines, Illinois, Mississippi, Mackinaw. Oklahoma - Washington County. Bixby - (a Tulsa suburb), Tahlequah, Muskogee, Bartlesville, Hulah, Copan, Dewey, Enid, Blackwell, Kingfisher, Guthrie, Coyle, Dover, Miami, Moffett. Rivers: Chikaskia, Caney, Arkansas, Neosho. Missouri - Rhinela a Hermann in Montgomery County; St. Louis a St. Charles Counties; Portage des Sioux, West Alton. Rivers: Missouri, Mississippi, Blackwater, Meramec. Flooding also reported in Michigan, Minnesota, Kansas, Ohio. 09/26/86 10/13/86 18 10 55,000 $40,000,000 Heavy rain    worst in Oklahoma history 3    TsuCpSe* 107,600                28.4
1986-037 Iia a Bangladesh  Iia - West Bengal state, Calcutta area a districts of Hooghly, Howarah, Parganas, a Midnapore. Ganges River. Bangladesh -  25 districts including: Khulna, Bagerhat, Sathkhira, Pathuakhali, Barguna, Jessore, Faridpur; Dhaka a Chittagong areas. Teesta a Jamuna rivers 09/22/86 10/10/86 19 49 700,000   Heavy rain     1 748,507  Tszo 231,500                14.2
1986-036 US West  North-central Montana - Fort Belknap Reservation, Phillips County. Towns: Malta, Harlem, Saco. Flooding along the Milk River a its tributaries from Chinook to Nashua 09/25/86 10/05/86 11 1 700 $36,000,000 Heavy rain   "worst in 30 years along the Canadian border" 2    CpSe 49,270                10.6
1986-035 US Midwest  Michigan's Lower Peninsula -  Oceano County: towns of Pentwater a Hart, Pentwater River, dam burst at Hart Lake. Gratiot County: Rainbow Lake Dam collapsed flooding the Maple River. Tittabawasee River at Midla. Rogue River at village of Belmont. Saginaw River at Saginaw. Cass River at Vassar. Clinton, Ionia a Gratiot counties. Southeastern Wisconsin - Sheboygan a Fo du Lac Counties 09/09/86 09/17/86 9 6 4,000 $323,000,000 Brief torrential rain   "The hardest-hit areas appear to have suffered the worst flood in modern history". "worst flooding in the state's history" (Michigan) 2    TsuCpS*** 53,940                10.2
1986-034 Northern Mexico  Nuevo Leon state, Monterrey city, Santa Catarina a Topo Chico rivers. 09/04/86 09/08/86 5 20 5,000   Heavy rain     1    Tso 14,130                  1.9
1986-033 US South Western Texas - Alpine, Alpine Creek. Big Spring, Crane, Midla, Odessa   09/02/86 09/05/86 4 3     Heavy rain     1    Tso 49,460                  3.1
1986-032 Azores Islas  Sao Miguel Isla - Nordeste, Povoacao, Mosteiros  09/01/86 09/02/86 2 3     Brief torrential rain     1    TsuCs 982                  0.2
1986-031 US Southeast  South Carolina - Scott Creek in Newberry. Union County, Lockwood   08/18/86 08/21/86 4 2 125   Heavy rain     1    TsoCp 3,756                  0.8
1986-030 Uruguay  Eastern a southern departments - Cebollati a Santa Lucia Rivers. 08/04/86 08/16/86 13   16,000   Heavy rain     1    TsoCp 48,990                  5.7
1986-029 Southeast Iia  Ahra Pradesh State - Districts:East Godavari, Adilabad a Khammam. Godavari River 08/15/86 08/22/86 8 150 3,000,000 $717,000,000 Monsoonal rain     1 404,687  Tpz 107,200                  6.8
1986-028 US Midwest  Southeastern Wisconsin -  Milwaukee, Burlington,Wauwatosa. Menomonee River 08/06/86 08/06/86 1 1 250   Brief torrential rain     1   TsuCpS*** 6,563                  0.1
1986-027 Japan - Typhoon Sarah  Prefectures: Tochigi, Ibaraki, Miyagi, Ibaragi a Shizuoka. Towns: Ishige. Kogai River. 08/05/86 08/08/86 4 17 3,000   21 See notes   1    TsoCpSe* 16,940                  1.8
1986-026 Northern Vietnam  Quang Ninh, Lang Son, Ha Bac, Bac Thai a Hai Hung provinces. Cities: Lang Son, Thai Nguyen. Red River 07/25/86 08/04/86 11       Heavy rain     1 1,530,000,000  Tpz 66,100                  6.2
1986-025 Northern China  Jilin Province. Heilongjiang Province, Daqing area, Songhua River  06/25/86 08/24/86 61   800,000 $1,200,000,000 Brief torrential rain     1    TspCpSe* 604,400                32.0
1986-024 Iia a Bangladesh Iia - States: Uttar Pradesh, Madhya Pradesh, Bihar. Ganges River  Bangladesh - Chapainawabganj district. Rajshahi Region, Ganges River 06/15/86 08/20/86 67 258 3,040,000   Monsoonal rain     1 414,398  Tszo 506,500                29.9
1986-023 Southern China -typhoon Coastal areas of Guangxi Zhuang autonomous region. Counties: Hepu, Qinzhou a Fangcheng. Nanning city. Yongjiang River. 07/21/86 07/31/86 11 73 50,000 $42,248,463 Tropical cyclone See notes   1 48,000  TsoCp 116,900                  8.2
1986-022 Canada  Central a northern Alberta; Edmonton. Rivers: North Saskatchewan, Pembina 07/18/86 07/22/86 5 0 1,000 $72,000,000,000 Heavy rain See notes worst since 1915 2    CSs** 47,000                  7.0
1986-021 Columbia  Eastern Provinces: Aracua, Casanare, Guainia, Guaviare. 07/10/86 07/30/86 21 4 28,000 $2,500,000 Heavy rain     1    Tpz 199,500                13.6
1986-020 Philippines a Eastern China- Typhoon Peggy Philippines - Luzon Isla. Provinces: Nueva Ecija, La Union, Cagayan, Tarlac, Pangasinan. low-lying areas in Manila, Baguio. China - Guangdong Province, Jiexi a Puning counties. Lufeng town 07/09/86 07/13/86 5 103 530,000 $165,500,000 21     1 259,809 Tpz. Tszo 46,630                  3.5
1986-019 US Midwest  Iowa - West Des Moines, Van Meter, Des Moines. Raccoon River . Nebraska - town of DeWitt. Big Blue River, Turkey a Swan Creeks 07/01/86 07/02/86 2 1 640 $3,000,000 Heavy rain   Racoon a Big Blue rivers reach record levels 2 85,794 TsuCpSe*  6,980                  1.2
1986-018 US South - Hurricane Bonnie  Northwestern Lousiana -  Shreveport area, Caddo a Bossier parishes. Eastern Texas - Beaumont, Rye, Liberty County. Trinity River 06/27/86 06/30/86 4 1 1,000 $5,000,000 Brief torrential rain See notes   1    TsuCpSe* 25,820                  2.2
1986-017 Chile  Central Chile - Santiago area, Curico; rural districts of Talca a Rengo, regions of O'Higgins a Maule. Mapocho River 06/15/86 06/18/86 4 40 45,000   Heavy rain     1    Cp 27,960                  2.3
1986-016 Jamaica, Haiti, Cuba a Dominican Republic - tropical storm Arew Jamaica - southern a western parishes, Kingston area, Savanna La Mar, May Pen, Old Harbor Bay, Lucie. Wag Water River. Dominican Republic - Santo Domingo city. Haiti - area arou Les Cayes city. Cuba - eastern a central provinces: Guantanamo, Santiago de Cuba, Granma, Las Tunas, Holguin a Camaguey. 06/04/86 06/15/86 12 94 11,860 $25,000,000 Heavy rain See notes Jamaica: similiar to 1979 floods. Haiti:  worst in decades 1 1,618  Tpo 81,750                  7.1
1986-015 US Southwest  Central Texas - Bexar County; Dallas area, San Antonio, Del Rio, De Leon, Abilene, Comanche, Sweetwater, Spleora. Rivers: San Antonio, Olmos Creek, Peach Creek  05/31/86 06/11/86 12 10 3,500   Brief torrential rain     1    Tsu 26,900                  4.1
1986-014 US East  Pennsylvania - northern Allegheny County. Pittsburgh's northern suburbs: Etna, Iiana, O'Hara a Shaler townships. Allegheny River tributaries Pine Creek a Little Pine Creek 05/30/86 05/31/86 2 8 10 $20,000,000 Brief torrential rain See notes   1   TsuCpSe*  1,700                  0.3
1986-013 Chile  Cities: Valparaiso, Santiago, Concepcion, San Antonio 05/27/86 05/29/86 3 8 17,000   Brief torrential rain See notes   1    Cp 27,960                  1.8
1986-012 US Southwest  Texas - Fort Worth area. Marine Creek 05/24/86 05/24/86 1 3 100   Brief torrential rain See notes   1    Tsu 5,250                  0.1
1986-011 Solomon Islas - Cyclone Namu Islas - Malaita, Makira, eastern e of Guadacanal.  05/19/86 05/20/86 2   10,000   Tropical cyclone     1    Tpz 28,740                  1.2
1986-010 Central US   Southeast Missouri: Cape Girardeau, Scott a Madison Counties 05/15/86 05/15/86 1 3   $100,000,000 Brief torrential rain     1    TsuCpSe* 6,446                  0.1
1986-009 Thaila Bangkok city. Provinces: Uthai Thani, Kamphaeng Pit, Rayong, Ratchaburi 05/09/86 05/12/86 4 32   $3,850,000 Monsoonal rain     2 32,260  Tpz 83,430                  8.0
1986-008 Iran Central Iran - Provinces: Isfahan, Hamedan, Lorestan a Khuzestan. 05/02/86 05/06/86 5 26 1,000 $30,000,000 Heavy rain     1   Cs 206,300                  7.3
1986-007 Brazil Northeast Brazil - Pernambuco state. Towns: Mombaca, Procoto a Cavalos 04/23/86 04/25/86 3 11     Brief torrential rain See notes   1   Tpo 155,300                  4.3
1986-006 Argentina  Northern Argentina - Provinces: Chaco, Entre Rios, Formosa, Santa Fe. 04/11/86 05/07/86 27 2 55,000   Heavy rain     1 176,000  TspCp 269,500                17.1
1986-005 Central US Wisconsin - Towns: Green Bay, Oconto. Rivers: East, Oconto, Suamico a Duck Creek. Michigan - Osceola County. Town: Evart. Muskegon River. Minnesota a upper Mississippi rivers 03/27/86 04/05/86 10 2 496 $200,000 Ice jam/break-up     1   TsuCpSe* 4,325                  1.5
1986-004 Peru a Bolivia Peru - Lake Titicaca region:15 villages as well as the provincial capital, Puno. Bolivia - Lake Titicaca region, Guaqui a Desaguadero. Santa Cruz province 02/01/86 05/01/86 90   300,000 $50,000,000 Brief torrential rain   Bolivia "worst this century " 3   Tsu 94,880                41.6
1986-003 Western US Northern a Central California - Napa, Humbolt, Sonoma a Yuba Counties. Towns: Napa, Guerneville, Lia. Rivers: Russian, Napa, Eel, Yuba Western Nevada: Towns: Reno. Rivers: Truckee 02/12/86 02/27/86 16 18 30,000 $319,000,000 Brief torrential rain   worst flooding in Napa since 1955 2   TsoCs 88,740                16.5
1986-002 Bolivia Northeast Bolivia - Cochabamba a La Paz region. Towns: Villa Fatima, Nueva Esperanza, Tocopilla. Chapare River 01/06/86 04/03/86 88 30 11,300 $42,000,000 Heavy rain   "worst this century" 2 35,000 Tsu 62,580                22.4
1986-001 Western a Central US Oregon - Towns: Ontario, Nyssa. Rivers: Snake. Idaho - Snake River. Michigan - Towns: Algonac. Rivers: St. Clair, Muskegon 01/01/86 01/06/86 6   100   Ice jam/break-up     1 500 TsuCpSe* 1,743                  0.7
Yearly Totals or Averages     13.3    1,554      8,862,982 $75,157,098,463           1,532,216,573           4,153,428  
An archive number is assigned to any flood that appears to be "large": significant damage to structures or agriculture, long intervals since the last similar event, and/or fatalities
*Severity assessment is on 1-3 scale
Class I: large flood events: significant damage to structures or agriculture; fatalities; and/or 1-2 decades-long reported interval since the last similar event. 
Class 2: very large events: greater than 20 yr but less than 100 year recurrence interval, and/or a local recurrence interval of at 10-20 yr.
Class 3: Extreme events: with an estimated recurrence interval greater than 100 years
**Flood Magnitude = ln(duration) * severity class * sqrt(affected region)/100 {if duration=1, then duration is set at 1.1 for this calculation.}
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