Hazard Score
226 Catastrophes Recorded
Johnson County, Iowa
5 Cities with a Population of 156,486, and 52,715 Households
Johnson County, Iowa faces a relatively moderate overall risk score of 93.19, with specific risks such as heavy wind events (93.84) and tornadoes (95.23) presenting very high risk ratings. The county has seen historical events such as hail (98.35) and flooding (97.96) causing significant damage. With a population of 152,809, the area's vulnerability to climate hazards is evident in the high risk values associated with wind storms (78,330.84), hail events (6,200,776.28), and flooding (17,679,705.74).
Geologically, Johnson County is located inland and lacks direct exposure to coastal or volcanic risks. However, the presence of water bodies like the Iowa River and geological features such as fault lines and mountain peaks can contribute to the county's susceptibility to flooding and landslides. The county's relatively low to moderate seismic risk (71.68) highlights the potential for earthquake events to impact the area. The surrounding topography and proximity to the Mississippi River can also increase the risk of flooding during extreme weather events.
Overall, Johnson County's climate risks are influenced by its inland location and various geological features that can exacerbate hazards such as severe weather events and flooding. The county's risk profile, which includes a relatively high risk rating for hail events (98.35) and tornadoes (98.34), underscores the importance of disaster preparedness and mitigation strategies. By considering the specific ratios and percentages of different hazard events, along with historical occurrences and nearby geological features, local authorities and residents can better understand and address the potential risks facing the area.
Wildfire Risk: Very Low
Tornado Risk: Low
Hurricane Risk: Very Low
Hail Risk: Low
Flood Risk: High
Tsunami Risk: Very Low
Earthquake Risk: Very Low
Wind Risk: Low
HAZARDS
27
Power Transmission Lines
0
Coastlines
33
Water Bodies
0
Fault Lines
EMERGENCY SERVICES
26
Hazard Shelters
13
Fire Stations
6
Hospitals
4
Police Stations
COMMUNITY PROFILE
Johnson County, Iowa has a total population of 156,486 with a population density of 251.2 people per square mile. The population has increased since the 2010 census where it was recorded at 130,882. The county is predominantly White, making up 71.6% of the population, followed by Black (4%), Hispanic (4%), and Asian (4.4%). The county has a relatively young population, with a median age of 29.4 years, and a fairly balanced gender distribution with slightly more males (49.7%) than females (49.6%). The average household size is 2.33 people, with a total of 52,715 households in the county.
In comparison to other counties in Iowa, Johnson County has a higher population density and a larger percentage of Asian and Hispanic residents. The county also has a lower median age compared to the state average, which is 38.1 years. Johnson County has a higher average household size compared to the state average of 2.40. In terms of housing, the county has a higher percentage of owner-occupied households (59.2%) compared to renter-occupied households (40.5%), which is similar to the state average. Additionally, Johnson County has a higher average farm size and average farm sales compared to the state average, indicating a strong agricultural presence in the county.
Regions
CLIMATE OVERVIEW
NATURAL CATASTROPHE TIMELINE
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Hailstorm
2020-07-11
Tornado
2020-05-23
Hailstorm
2020-04-07
019126
2019-07-22
Tornado
2019-05-29
Tornado
2019-05-24
Flooding
Heavy Rain
2019-04-30019102
2019-04-21
019010
2019-03-23
Flooding
Snowmelt, Heavy Rain, Ice Jams
2019-03-13Hailstorm
2018-06-09
Hailstorm
2018-05-14
Hailstorm
2018-05-14
Hailstorm
2018-05-02
Hailstorm
2018-05-02
Hailstorm
2018-05-02
Hailstorm
2018-05-02
Tornado
2017-07-21
Hailstorm
2017-07-21
Hailstorm
2017-07-21
Hailstorm
2017-07-21
Hailstorm
2017-07-11
Hailstorm
2017-07-11
Hailstorm
2017-06-15
Hailstorm
2017-05-17
Hailstorm
2017-04-10
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-28
Hailstorm
2017-02-23
Hailstorm
2016-06-22
Hailstorm
2015-11-11
Hailstorm
2015-11-11
Hailstorm
2015-04-08
Hailstorm
2014-09-04
Hailstorm
2014-08-04
Hailstorm
2014-08-04
Hailstorm
2014-08-04
Hailstorm
2014-07-12
Hailstorm
2014-06-16
Hailstorm
2014-06-16
Hailstorm
2014-06-16
Hailstorm
2014-06-16
Hailstorm
2014-06-16
Flooding
Heavy Rain
2014-06-10Hailstorm
2014-05-12
Hailstorm
2014-04-27
Hailstorm
2014-04-27
Tornado
2014-04-13
Hailstorm
2014-02-20
Hailstorm
2013-07-19
Flooding
Heavy Rain
2013-05-25Flooding
Heavy Rain
2013-04-22Hailstorm
2013-04-17
Hailstorm
2013-04-17
Hailstorm
2013-04-17
Hailstorm
2012-09-07
Hailstorm
2012-08-19
Hailstorm
2012-05-03
Hailstorm
2012-05-03
Hailstorm
2011-06-09
Hailstorm
2011-06-08
Hailstorm
2011-05-24
Hailstorm
2011-05-22
Hailstorm
2011-05-22
Hailstorm
2011-05-22
Hailstorm
2011-05-22
Hailstorm
2011-05-22
Hailstorm
2011-05-22
Hailstorm
2011-04-03
Hailstorm
2011-04-03
Hailstorm
2011-04-03
Hailstorm
2011-04-03
Flooding
Heavy Rain And Snow
2011-03-07Flooding
Dam Failure, Heavy Rain
2010-07-25Hailstorm
2010-06-18
Hailstorm
2010-04-30
Hailstorm
2010-04-30
Hailstorm
2010-04-06
Hailstorm
2010-04-05
Hailstorm
2010-04-05
Hailstorm
2010-04-05
Hailstorm
2010-04-05
Hailstorm
2010-04-05
Flooding
Heavy Rain Snowmelt Dam B
2010-03-10Hailstorm
2009-07-10
Hailstorm
2009-07-10
Hailstorm
2009-07-10
Hailstorm
2009-07-10
Hailstorm
2009-07-10
Flooding
Heavy Rain
2009-02-28Flooding
Heavy Rain
2008-12-10Hailstorm
2008-07-21
Hailstorm
2008-06-14
Hailstorm
2008-06-14
Hailstorm
2008-06-14
Hailstorm
2008-06-14
Hailstorm
2008-06-14
Flooding
Heavy Rain
2008-06-05Tornado
2008-05-25
Flooding
Rain And Snowmelt
2008-03-17Hailstorm
2007-10-02
Hailstorm
2007-09-30
Flooding
Heavy Rain
2007-08-16Hailstorm
2007-07-16
Hailstorm
2007-07-16
Hailstorm
2007-07-16
Hailstorm
2007-06-21
Flooding
Heavy Rain
2007-05-06Hailstorm
2007-03-31
Hailstorm
2006-11-10
Hailstorm
2006-06-25
Hailstorm
2006-06-21
Hailstorm
2006-06-06
Hailstorm
2006-06-06
Hailstorm
2006-06-06
Tornado
2006-04-13
Tornado
2006-04-13
Tornado
2006-04-13
Tornado
2006-04-13
Tornado
2006-04-13
Tornado
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-13
Hailstorm
2006-04-02
Hailstorm
2006-04-02
Hailstorm
2006-03-12
Hailstorm
2004-08-27
Flooding
Heavy Rain
2004-05-22Hailstorm
2004-05-20
Hailstorm
2004-05-17
Hailstorm
2004-05-07
Hailstorm
2004-05-07
Hailstorm
2004-05-07
Hailstorm
2004-05-07
Hailstorm
2004-05-07
Hailstorm
2004-05-07
Hailstorm
2003-05-14
Hailstorm
2003-05-14
Hailstorm
2003-05-10
Hailstorm
2002-10-01
Flooding
Heavy Rain
2002-06-04Hailstorm
2002-04-18
Hailstorm
2002-04-18
Hailstorm
2001-05-10
Tornado
2001-04-11
Tornado
2001-04-11
Tornado
2001-04-11
Hailstorm
1999-06-06
Hailstorm
1998-06-18
Hailstorm
1998-06-18
Hailstorm
1998-06-18
Hailstorm
1997-05-18
Hailstorm
1997-05-18
Hailstorm
1997-05-18
Hailstorm
1995-08-08
Hailstorm
1994-06-07
Hailstorm
1994-06-07
Hailstorm
1994-06-07
Tornado
1991-09-12
Tornado
1991-05-29
Hailstorm
1991-05-17
Tornado
1991-03-22
Flooding
Heavy Rain
1990-08-18Flooding
Heavy Rain
1990-07-28Tornado
1990-03-08
Hailstorm
1989-04-28
Tornado
1988-05-08
Hailstorm
1987-07-06
Hailstorm
1987-06-01
Tornado
1986-09-22
Hailstorm
1985-06-23
Tornado
1983-06-29
Hailstorm
1982-07-12
Hailstorm
1981-10-05
Hailstorm
1981-04-10
Hailstorm
1980-08-04
Hailstorm
1980-08-04
Hailstorm
1979-09-24
Hailstorm
1979-05-18
Tornado
1977-08-15
Tornado
1977-08-15
Tornado
1975-11-09
Hailstorm
1975-06-13
Hailstorm
1975-05-11
Tornado
1975-04-23
Tornado
1974-07-22
Hailstorm
1974-06-22
Hailstorm
1974-06-20
Tornado
1974-04-28
Hailstorm
1974-04-13
Tornado
1972-06-05
Hailstorm
1971-05-31
Hailstorm
1971-05-31
Hailstorm
1971-05-18
Hailstorm
1968-05-15
Tornado
1962-05-22