|Region||British Columbia Coast|
|• Total||36,303.31 km2 (14,016.79 sq mi)|
|• Extended area||31,368.24 km2 (12,111.35 sq mi)|
|• Core area||4,935.07 km2 (1,905.44 sq mi)|
|• Density||84.1/km2 (218/sq mi)|
|• Core area||2,924,685[b]|
|• Extended area||124,811|
|Time zone||UTC−08:00 (PST)|
|• Summer (DST)||UTC−07:00 (PDT)|
|Postal code prefixes|
|Area codes||236, 604, 672, 778|
The Lower Mainland is a geographic and cultural region of the mainland coast of British Columbia that generally comprises the regional districts of Metro Vancouver and Fraser Valley. Home to approximately 3.05 million people as of the 2021 Canadian census,[a] the Lower Mainland contains sixteen of the province's 30 most populous municipalities and approximately 60% of the province's total population.
Although the term Lower Mainland has been recorded from the earliest period of colonization in British Columbia, it has never been officially defined in legal terms. The term has historically been in popular usage for over a century to describe a region that extends from Horseshoe Bay south to the Canada–United States border and east to Hope at the eastern end of the Fraser Valley. This definition makes the term Lower Mainland almost synonymous with the regional districts of Metro Vancouver and Fraser Valley.
However, the British Columbia Geographical Names Information System (BCGNIS) comments that most residents of Vancouver might consider it to be only areas west of Mission and Abbotsford, while residents in the rest of the province consider it to be the Sea-to-Sky Corridor south of Whistler and west of Hope.
The region is bounded to the north by the Pacific Ranges and to the southeast by the Cascade Mountains, and is traversed from east to west by the Fraser River. Due to its consistency of climate, flora and fauna, geology and land use, "Lower Mainland" is also the name of an ecoregion—a biogeoclimatic region—that comprises the eastern part of the Georgia Depression and extends from Powell River on the Sunshine Coast to Hope at the eastern end of the Fraser Valley.
One of the mildest climates in Canada, the region has a mean annual temperature of 9 °C (48 °F) with a summer mean of 15 °C (59 °F) and a winter mean of 3.5 °C (38.3 °F). Annual precipitation ranges from an annual mean of 850 millimetres (33 in) in the west end to 2,000 millimetres (79 in) in the eastern end of the Fraser Valley and at higher elevations. Maximum precipitation occurs as rain in winter. Less than ten percent falls as snow at sea level but the amount of snowfall increases significantly with elevation.
|Source: Statistics Canada|
As of the 2021 census, the population of the Lower Mainland core area totals 2,966,830:
These figures are slightly inflated due to the inclusion of areas within the Regional Districts which are not normally considered to be part of the Lower Mainland, notably the lower Fraser Canyon and the heads of Harrison and Pitt Lakes, which are within the FVRD, and Lions Bay and Bowen Island, which are within the Greater Vancouver Regional District.
The Lower Mainland is among the most diverse regions in Canada. Europeans form a slight majority at 51.5 percent, followed by East Asians at 20.8 percent and South Asians at 12.2 percent.
|Ethnic groups in the Lower Mainland (2016)||Population||%|
The Lower Mainland includes large Christian, irreligious, and Sikh communities. The Sikh population, numbering over 265,000 persons or 9.1 percent of the total population is statistically significant across Metro Vancouver and the Fraser Valley; proportionally, it is more than four times the national average of 2.1 percent.
Regional districts were first created across British Columbia in 1966–1967 to form bodies for inter-municipal coordination and to extend municipal-level powers to areas outside existing municipalities. Today, the Lower Mainland includes two regional districts: the Metro Vancouver Regional District (MVRD) and the Fraser Valley Regional District (FVRD). Both regional districts, however, include areas outside the traditional limits of the Lower Mainland. Metro Vancouver includes areas like Surrey and Langley that are geographically in the Fraser Valley.
The Metro Vancouver Regional District is made up of 21 municipalities. The MVRD is bordered on the west by the Strait of Georgia, to the north by the Squamish-Lillooet Regional District, on the east by the Fraser Valley Regional District, and to the south by Whatcom County, Washington, in the United States.
The Fraser Valley Regional District lies east of the Metro Vancouver Regional District, and comprises the cities of Abbotsford and Chilliwack, the district municipalities of Mission, Kent, and Hope, and the village of Harrison Hot Springs. It also includes many unincorporated areas in the Fraser Valley and along the west side of the Fraser Canyon (the Fraser Canyon is not in the Lower Mainland).
Regional district powers are very limited and other localized provincial government services are delivered through other regionalization systems.
The traditional territories of the Musqueam and Tsleil'waututh lie completely within the region; the southern portion of Squamish traditional territory is also in the region. Its claims overlap those of the Tsleil-waututh, Musqueam, and Kwikwetlem. Other peoples whose territories lie within the region are the Sto:lo, Chehalis, Katzie, Kwantlen, Tsawwassen, and Semiahmoo; many of their territories overlap with those of the Musqueam, and with each other. Many other peoples of the Georgia Strait region also frequented the lower Fraser, including those from Vancouver Island and what is now Whatcom County, Washington.
Sto:lo traditional territory, known as Solh Temexw in Halkomelem, more or less coincides with the traditional conception of the Lower Mainland, except for the inclusion of Port Douglas at the head of Harrison Lake, which is in In-SHUCK-ch territory, and the lands around Burrard Inlet.
Health system services and governance in the Lower Mainland are provided by Vancouver Coastal Health, serving Vancouver, Richmond and the North Shore, and the mainland coast as far north as the Central Coast region, and Fraser Health, which serves the area of the Lower Mainland east of Vancouver and Richmond.
The Lower Mainland is considered to have a high vulnerability to flood risk. There have been two major region-wide floods in 1894 and 1948, both associated with an extreme spring freshet of the Fraser River. Other major floods in the Lower Mainland – including June 1972, November 1990, and November 2021 – have been more localized, primarily impacting areas in the Fraser Valley like the Sumas Prairie, with comparatively minor impacts to Metro Vancouver. Prior to the 2021 flood, according to the Fraser Basin Council, scientists predicted a one-in-three chance of a similar-sized flood occurring in the next 50 years.
In the second quarter of 2007, the Lower Mainland was on high alert for flooding. Higher than normal snow packs in the British Columbia Interior prompted municipal governments to start taking emergency measures in the region. Dikes along the Fraser River are regulated to handle approximately 8.5 metres (28 ft) at the Mission Gauge (the height above sea level of the dykes at Mission). Warmer than normal weather in the province's Interior region caused large amounts of snow to melt prematurely, resulting in higher-than-normal water levels, which, nevertheless, remained well below flood levels.
Flooding can cover much of the Lower Mainland. Cloverdale, Barnston Island, low-lying areas of Maple Ridge, areas west of Hope, White Rock, Richmond, parts of Vancouver, and parts of Surrey are potentially at risk. In 2007, the Lower Mainland was largely spared, although northern regions of the province, along the Skeena and Nechako Rivers, experienced floods. Climate scientists predict that increasing temperatures will mean wetter winters and more snow at the high elevations. This will increase the likelihood of snowmelt floods.
The provincial government maintains an integrated flood hazard management program and extensive flood protection infrastructure in the Lower Mainland. The infrastructure consists of dikes, pump stations, floodboxes, riprap, and relief wells.
While earthquakes are common in British Columbia and adjacent coastal waters, most are minor in energy release or are sufficiently remote to have little effect on populated areas. Nevertheless, earthquakes with a magnitude of up to 7.3 have occurred within 150 kilometres (93 mi) of the Lower Mainland.
Based on geological evidence, however, stronger earthquakes appear to have occurred at approximately 600-year intervals. Therefore, there is a probability that there will be a major earthquake in the region within the next 200 years.
In April 2008, the United States Geological Survey released information concerning a newly found fault south of downtown Abbotsford, called the Boulder Creek Fault. Scientists now believe this fault is active and capable of producing earthquakes in the 6.8 magnitude range.
Much of the Lower Mainland is vulnerable to explosive eruptions from the Garibaldi Volcanic Belt. Volcanoes in this zone are capable of producing large quantities of volcanic ash that may cause short and long term water supply problems for Lower Mainland communities. All airports covered by the accompanying eruption column would be closed, heavy ash falls would damage electrical equipment and weak structures could collapse under the weight of the ash.
The Lower Mainland's communities includes large cities in Metro Vancouver, and smaller cities, towns and villages along both banks of the Fraser River. Neighbourhoods within cities are not listed unless historically or otherwise notable and/or separate. Only some of the many Indian Reserves are listed.
Upper Fraser Valley
Central Fraser Valley
Lower Fraser Valley / Metro Vancouver
- Barnston Island
- Boundary Bay
- Crescent Beach
- Derby ("Old Derby")
- Fort Langley
- Kanaka Creek
- Langley City
- Langley District
- Lions Bay
- Maple Ridge
- New Westminster
- North Vancouver City
- North Vancouver District
- Pitt Meadows
- Port Coquitlam
- Port Hammond (Hammond)
- Port Kells
- Port Moody
- West Vancouver
- White Rock
- Total population of the Lower Mainland Economic Region, which includes the Metro Vancouver Regional District, Fraser Valley Regional District, Squamish-Lillooet Regional District, and Sunshine Coast Regional District.
- Combined population of the Metro Vancouver Regional District and the Fraser Valley Regional District.
- "Data table, Census Profile, 2021 Census of Population - Lower Mainland--Southwest [Economic region], British Columbia". Retrieved 10 February 2022.
- Government of Canada, Statistics Canada (26 October 2022). "Census Profile, 2021 Census of Population Profile table Greater Vancouver, Regional district British Columbia [Census division]". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (26 October 2022). "Census Profile, 2021 Census of Population Profile table Fraser Valley, Regional district British Columbia [Census division]". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Gentilcore, R.L., ed. 1993. Historical Atlas of Canada, Vol II, The Land Transformed 1800–1891. Plate 36, "Lower Mainland 1881." Toronto: University of Toronto Press. ISBN 0-8020-3447-0.
- "Lower Mainland". BC Geographical Names.
- Environment Canada. Ecoregions of Canada – Lower Mainland Archived 16 May 2013 at the Wayback Machine. Ecological Framework of Canada. Retrieved on: 9 July 2011
- Government of Canada, Statistics Canada (27 October 2021). "Census Profile, 2016 Census Greater Vancouver, Regional district [Census division], British Columbia and British Columbia [Province]". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (27 October 2021). "Census Profile, 2016 Census Fraser Valley, Regional district [Census division], British Columbia and British Columbia [Province]". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (31 May 2016). "2011 Census of Population Census Profile Greater Vancouver, RD British Columbia (Census division)". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (31 May 2016). "2011 Census of Population Census Profile Fraser Valley, RD British Columbia (Census division)". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (20 August 2019). "2006 Community Profiles Greater Vancouver British Columbia (Regional district)". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (20 August 2019). "2006 Community Profiles Fraser Valley British Columbia (Regional district)". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (2 July 2019). "Community Highlights for Greater Vancouver Regional District". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (2 July 2019). "Community Highlights for Fraser Valley Regional District". www12.statcan.gc.ca. Retrieved 13 November 2022.
- "Community Highlights for Fraser Valley Regional District".
- Census Profile, 2016 Census: Fraser Valley, Regional district. Statistics Canada. Retrieved 27 July 2018.
- Census Profile, 2016 Census: Greater Vancouver, Regional district. Statistics Canada. Retrieved 2 April 2018.
- Government of Canada, Statistics Canada (27 November 2015). "NHS Profile, Greater Vancouver, RD, British Columbia, 2011". www12.statcan.gc.ca. Retrieved 13 November 2022.
- Government of Canada, Statistics Canada (27 November 2015). "NHS Profile, Fraser Valley, RD, British Columbia, 2011". www12.statcan.gc.ca. Retrieved 13 November 2022.
- BC Ministry of Health. British Columbia Health Authorities: Maps Archived 5 July 2011 at the Wayback Machine. Retrieved on: 10 July 2011.
- "Flood History". Flood Wise. Retrieved 29 November 2021.
The Lower Mainland has experienced two major Fraser River floods in just the past 130 years. The largest flood on written record was in 1894, and the second largest was in 1948. Earlier large-scale floods are also part of the oral history of Coast Salish First Nations.
- "From the Archives: The 1894 and 1948 Fraser Valley floods". Vancouver Sun. 17 November 2021. Retrieved 29 November 2021.
- "This Week in History: 1894 & 1948 The Fraser Valley is inundated in a great flood". Vancouver Sun. 19 November 2021. Retrieved 29 November 2021.
- "Flooding events in Canada: British Columbia". Government of Canada. 2 December 2010. Retrieved 29 November 2021.
On June 16, the lower Fraser peaked at Hope, with a maximum instantaneous flow of 3400 cubic metres per second and a maximum elevation of 7.1 metres, well above the danger level of 6.1 metres.
- "River flooding part of Hope history". Hope Standard. 27 June 2012. Retrieved 29 November 2021.
In 1972, the Fraser River again experienced record flood waters – the second highest in recorded times with a discharge of 12,900 cubic metres per second and a maximum height of 10.141 meters at Hope on June 16. Wardle Street and part of Seventh Avenue were submerged, and on Tom Berry Road 10 houses were flooded and families were forced to evacuate their properties. Pumps were brought in to remove water and residents were able to return home after approximately a week.
- "The Fraser River doesn't pose the only flood threat to Abbotsford". The Abbotsford News. 17 May 2018. Retrieved 29 November 2021.
A Nooksack flood in 1990 swamped the Whatcom Road interchange and western portions of Sumas Prairie. Such a flood is expected to take place every 35 years or so. There are worries that a larger flood event would change the course of the river entirely, diverting it north into the channel of the much-smaller Sumas River.
- "Group tasked with preventing major Fraser Valley flood hasn't met in seven years". Today In BC. 3 September 2018. Retrieved 29 November 2021.
In 1990, the Nooksack River in northern Washington overflowed its banks, with its waters flooding over the border and into Sumas Prairie. The flood cut off Highway 1, and also inundated the towns of Everson and Sumas.
- "Flood Hazard Management on the Fraser River". Fraser Basin Council. Archived from the original on 26 June 2008. Retrieved 18 June 2008.
- "Fraser Valley prepares for possible flooding". CBC News. 5 June 2007. Archived from the original on 9 July 2007. Retrieved 24 June 2007.
- Nguyen, Linda (7 June 2007). Lower Mainland at flood risk for weeks yet Archived 26 June 2007 at the Wayback Machine. Vancouver Sun. Retrieved on: 18 June 2008.
- Drake, Laura (16 June 2007). "Flooding in future may be more frequent, scientists say". Globe and Mail. Retrieved 24 June 2007.
- Ministry of Environment. "Lower Mainland Dike and Emergency Maps". Archived from the original on 20 June 2007. Retrieved 24 June 2007.
- British Columbia. Provincial Emergency Program. (1999). British Columbia Earthquake Response Plan, Appendix 2-The Earthquake Threat Archived 13 November 2008 at the Wayback Machine. ISBN 0-7726-3924-8. Retrieved on: 7 April 2008.
- McClatchy Washington Bureau. Earthquake risk. Retrieved on 12 May 2009.
- "Garibaldi volcanic belt: Garibaldi Lake volcanic field". Catalogue of Canadian volcanoes. Natural Resources Canada. 1 April 2009. Archived from the original on 13 May 2008. Retrieved 26 May 2018.
- V. Stasiuk, Mark; J. Hickson, Catherine; Mulder, Taimi (2003), "The Vulnerability of Canada to Volcanic Hazards", Natural Hazards, Kluwer Academic Publishers, 28 (2/3): 580, doi:10.1023/A:1022954829974, ISSN 0921-030X, S2CID 129461798
- Lower Mainland travel guide from Wikivoyage