As of August 11, there were four mass shootings in the United States in 2025. This is compared to one mass shooting in 1982, one in 2000, and 12 mass shootings in 2022 and 2023. School shootings The United States sees the most school shootings in the world. Some motivations for school shootings included depression, seeking revenge, and bullying. As a result of the large amount of school shootings, gun control has become a central topic in U.S. politics. This widespread problem happens across the United States; however California saw the highest number of K-12 school shootings in the United States since 1970. However, the deadliest school shooting (as of October 2023) was the Virginia Tech massacre in 2007. This tragedy left 33 dead and 23 injured. Mass shooting issues Mass shootings happen when there are several injuries or deaths from a firearm-related violence. Throughout the last century, mass shootings have become an epidemic in the United States. However, despite the increase in mass shootings and number of casualties, the U.S. government has done little to prevent future shootings from happening. As a result of the lack of cooperation in politics, mass shootings have become an important issue for Generation Z living in the United States. Furthermore, having the right to bear arms is a popular belief in the U.S. and the percentage of households in the United States owning at least one firearm has remained somewhat steady since 1972.

As of August 2025, California had the most mass shootings in the United States, with 26 total shootings since 1982. The source defines a mass shooting as a shooting where three or more people were killed. Recently, a mass shooting occurred in the state of Maine on October 26, 2023, during which one of the highest number of fatalities from a mass shooting was recorded after Robert Card opened fire in a bowling alley and a bar, killing 18 and injuring 13 others. Firearms in the U.S. Mass shootings in the United States are disturbingly common. In comparison with other Western countries, there are significantly more shootings in the U.S., which some theorize is due to the relatively lax gun control laws. Gun control laws in the U.S. are dependent on the state, and the right to own a firearm is enshrined in the United States Constitution. Mass shootings The worst mass shooting in the U.S. was the Las Vegas Strip massacre in 2017, which resulted in 58 deaths and 546 injuries. 13 of the worst mass shootings in the United States have occurred since 2015 and the vast majority of these incidents in the U.S. have been carried out by shooters who are White and male.

The map data is derived from the United Nations Environment Programme (UNEP) for the years ranging from 1989 to 1999. The map shows the concentration of the total military personnel by country measured in number of people. According to UNEP, military personnel refers to "active duty military personnel, including paramilitary forces if those forces resemble regular units in their organization, equipment, training, or mission." Online resource: http://geodata.grid.unep.ch URL original source: http://www.worldbank.org/data/

As of August 11, 14 people were killed in mass shootings in the United States in 2025. A total of 1,173 victims were fatally injured during mass shootings in the United States between 1982 and August 11, 2025.

As of July 14, 2025, there have been a total of 277 school shootings in California since 1966, the most out of any state. Texas had the second highest number of school shootings within this time period, with 237 shootings. The source defines a school shooting as every time a gun is brandished, fired, or a bullet hits school property for any reason, regardless of the number of victims (including zero), time, day or the week, or reason, including gang shootings, domestic violence, shootings at sports games and after hours school events, suicides, fights that escalate into shootings, and accidents.

The map data is derived from the United Nations Environment Programme (UNEP) for the years 1990, 1995, 2000, and 2005. The map shows the concentration of the population within 100 kilometers of coast by country measured in thousands of people. Online resource: http://geodata.grid.unep.ch URL original source: http://geodata.grid.unep.ch

As of June 2022, there were 153 school shootings in total in the United States in that year. Of these incidents, only two were active shooter incidents. The largest number of active shooter incidents in schools was in 2018, with 11 active shooters.

The source defines a shooting as any time a gun is brandished, fired, or a bullet hits school property for any reason.

The map data is derived from the United Nations Environment Programme (UNEP) for the years ranging from 1990 to 2003. The map shows the concentration of the total number of reported malaria cases by country measured in the total number per 100,000 population. Facts about Malaria, from UNEP: "There are over 40 species of anopheline mosquitoes that transmit human malaria, which differ in their transmission potential." "The most competent and efficient malaria vector, Anopheles gambiae, occurs exclusively in Africa and is also one of the most difficult to control." "Climatic conditions determine the presence or absence of anophelines vectors." "Tropical areas of the world have the best combination of adequate rainfall, temperature and humidity allowing for breeding and survival of anophelines." Online resource: http://geodata.grid.unep.ch URL original source: http://globalatlas.who.int/GlobalAtlas/DataQuery/browse.asp?catID=012800000000&lev=3

This dataset shows the locations of major rivers in Afghanistan. Rivers depicts line river features from United States Defense Mapping Agency 1:100,000 scale topography maps. This layer includes three types of classes primary, secondary and seasonal. However, there are some miss classifications of the rivers and there are no names of the rivers, either. This data was released in 1990 and was found online at the Afghanistan Information Management Services in Shape file format. This line data is intended for use within Afghanistan and is suitable for general studies and local planning.

The map data is derived from the United Nations Environment Programme (UNEP) for the years ranging from 1989 to 2006. The map shows the countries that participated in the Basel Convention by year. From UNEP: "The Basel Convention on the Control of Tranboundary Movements of Hazardous Wastes and their Disposal was adopted in 1989 and entered into force on 5 May 1992." Online resource: http://geodata.grid.unep.ch URL original source: http://www.basel.int/ratif/convention.htm

This data set illustrates the protected and total are of global non tropical forests. They are further defined as "Tropical forests included all forests located between the Tropics of Cancer and Capricorn. All other forests were put into the non-tropical categories. Montane forests within the tropics that were classified in the source maps as "temperate" were registered in the "tropical forests" categories in this study" (Earth Trends). http://earthtrends.wri.org/searchable_db/index.php?step=countries&ccID%5B%5D=0&allcountries=checkbox&theme=9&variable_ID=321&action=select_years http://earthtrends.wri.org/searchable_db/index.php?step=countries&ccID%5B%5D=0&allcountries=checkbox&theme=9&variable_ID=320&action=select_years September 25, 2007

This coverage shows the Oregon Congressional districts. This dataset was created to delineate Oregon Congressional districts for mapping purposes only. The coverage only delineates Congressional districts as they were drawn up by the Oregon Legislature for the 1990s.

This data summarizes mass car bombings that occurred around the World in the 90's. It includes information on total deaths and number of bombs used in the attacks. The source of the data is wikipedia: http://en.wikipedia.org/wiki/List_of_mass_car_bombings

The map data is derived from the United Nations Environment Programme (UNEP) for the years ranging from 1990 to 2001. The map shows the concentration of the total quantity of fongicides and/or bactericides used in or sold to the agricultural sector by country measured in metric tons. According to UNEP this is corresponds to the definition for pesticide consumption. The classifications of fongicides and bactericides include inorganics, dithiocarbamates, benzimidazoles, triazoles, diazoles, diazines, morpholines and others not elsewhere classified. Online resource: http://geodata.grid.unep.ch URL original source: http://apps.fao.org

The map data is derived from the United Nations Environment Programme (UNEP) for the years ranging from 1985 to 2006. The map shows the countries that participated in the Vienna Convention and Montreal Protocol by year. From UNEP: "Through The Vienna Convention on the Protection of the Ozone Layer governments committed themselves to protect the ozone layer and to co-operate with each other in scientific research to improve understanding of the atmospheric processes. The Montreal Protocol on Substances that Deplete the Ozone Layer was adopted by Governments in 1987 and has been modified five times so far. Its control provisions were strengthened through four adjustments to the Protocol adopted in London (1990), Copenhagen (1992), Vienna (1995), Montreal (1997) and Beijing (1999). The Protocol aims to reduce and eventually eliminate the emissions of man-made ozone depleting substances." Online resource: http://geodata.grid.unep.ch URL original source: http://www.unep.ch/ozone/ratif. shtml

Teen Death Rate (deaths per 100,000 teens ages 1519) is the number of deaths from all causes to teens between ages 15 and 19, per 100,000 teens in this age group. The data are reported by place of residence, not the place where the death occurred. SOURCES: * Death Statistics: U.S. Centers for Disease Control and Prevention, National Center for Health Statistics. * Population Statistics: U.S. Census Bureau.

Child Death Rate (deaths per 100,000 children ages 114) is the number of deaths to children between ages 1 and 14, from all causes, per 100,000 children in this age range. The data are reported by place of residence, not place of death. SOURCES: * Death Statistics: U.S. Centers for Disease Control and Prevention, National Center for Health Statistics. * Population Statistics: U.S. Census Bureau.