Roseville is the most populous city in Placer County, California, located within the Sacramento metropolitan area.

Today it has become a major commercial hub, attracting regular shoppers and visitors from a large swath of rural southeastern Sacramento Valley and the Sierra Nevada foothills.

In recent years, it has seen significant population growth and new single-family home developments, becoming a “boomburb” or edge city of Sacramento.

The Nisenan lived in the land that became Roseville for over 2000 years before being forcibly removed by disease, miners and settlers.

In 1909, three years after the Southern Pacific Railroad moved its facilities from Rocklin to Roseville, the town became an incorporated city.

But competition arose in new sectors: the postwar development of the national Interstate Highway System and the airline industry adversely affected the railroads' passenger and freight traffic.

Industry restructuring took place and jobs were lost as railroads dropped passenger routes and consolidated operations.

Construction in 1950 of the Washington Boulevard (then called Seawell) railroad underpass dramatically affected downtown.

[11] The city saw steady population growth throughout the ensuing decades, as shopping centers, major retailers, and homes were constructed, mostly outside the historic downtown.

Some of this growth was fueled by the arrival of major technology employers, such as Hewlett Packard (in 1979) and NEC (in 1983), in the city The population as of 2014 was 126,956 people.

[12] In 1988, the city embarked on a multi-million dollar plan to redevelop approximately 207 acres (0.8 km2) of land in the downtown core, and revitalize historic areas that had been in decline.

The Vernon Street Town Square now features a small raised stage, a water spray for children, and a venue for community events.

[citation needed] On April 28, 1973, a shipment of munitions bound for the Vietnam War exploded in Roseville's rail yard creating a massive disaster.

[15] On October 21, 2010, a young man set fires inside the Westfield Galleria at Roseville resulting in major damage to the mall.

Roseville has a hot-summer Mediterranean climate that is characterized by cool, wet, usually snowless winters and hot, dry summers (Köppen Csa).

The climate is similar to nearby Sacramento, the minor differences reflecting Roseville's more inland position, resulting in less of the moderating influence of the ocean.

Some marine influence does reach Roseville, so temperatures often are still more moderate than other inland parts of the Central Valley by up to 10 °F (5.6 °C).

The dry season lasts from June to October; similar to other Central Valley cities, temperatures can be extremely hot in the summer (routinely peaking above 105 °F (41 °C) on the hottest days), unusual for a non-desert climate at mid-latitude.

For any given year, summers can be consistently hot or mild depending on where the position of the North Pacific High settles around the end of June.

It has encouraged the addition of large retail centers, including one of the largest auto malls in the country,[25][26] which contributes significantly to sales tax receipts at the city and county level.

Companies based in the city include financial technology unicorn GoodLeap, which specializes in loans for residential solar energy.

Shopping plays a vital role in the economy of Roseville, which has the thirteenth highest retail sales of all California cities.

Westfield embarked on a 487,806-square-foot (45,319 m2) expansion project costing $270 million, because of the revenue they acquire from this high-end[28] mall.

Across the street from the Galleria, Peter Bollinger Investment Company built a $70 million complex named "Fountains at Roseville".

The first phase opened to the public on June 30, 2008, and includes many retailers, as well as a vast variety of casual and fine dining options.

[37] The City of Roseville provides electric, water, wastewater, and solid waste services to most areas.

Internet, cable, and/or telephone companies that service the Roseville area include AT&T, Comcast, and Consolidated Communications.