The problem with this isolation is that when rain doesn't come outside of desalination there won't be water. So, if there are long term droughts you either give people desalinated water or everyone moves away sort of turning Perth in to a Ghost town within a few years.
The same thing could happen to places like Palm Springs, Las Vegas and even Los Angeles and San Diego or even Phoenix, Arizona if droughts become bad enough. When droughts or low rainfall comes for too many years while those cities grow eventually any or all of them could become ghost towns within a few years if desalination doesn't become viable from the oceans.
Las Vegas' only source of water really is from the Hoover Dam as far as I know form the Colorado River. Palm Springs aquifer is expected to be completely drained within 10 years time. So, if other sources like the Colorado river are not tapped, Palm Springs and all the golf courses are going to just dry up then.
Los Angeles and San Diego's main source of water is from the Colorado River and the American Canal from Northern California. So, if either of these sources dry up or majorly reduce for any reason desalination would have to be the only viable alternative. Or Hauling water in water trucks from wherever or piping water from wherever to solve this issue too. The same is true of Perth and other places on earth.
Begin quote from:
https://en.wikipedia.org/wiki/Perth#Climate
Climate
Perth receives moderate though highly seasonal rainfall, making it the fourth wettest Australian capital city after Darwin, Sydney and Brisbane. Summers are generally very hot and dry, lasting from December to late March, with February generally being the hottest month of the year. Winters are relatively mild and wet, making Perth a classic example of a hot-summer Mediterranean climate (Köppen climate classification Csa).[46][47] Perth is a particularly sunny city for this type of climate; it has an average of 8.8 hours of sunshine per day, which equates to around 3200 hours of annual sunshine, and 138.7 clear days annually, making it the sunniest capital city in Australia.[48]Summer is not completely devoid of rain and humidity, with sporadic rainfall in the form of short-lived thunderstorms, weak cold fronts and on occasions decaying tropical cyclones from Western Australia's north-west, which can bring significant rainfall. Winters are also known to be clear and sunny. The highest temperature recorded in Perth was 46.2 °C (115.2 °F) on 23 February 1991, although Perth Airport recorded 46.7 °C (116.1 °F) on the same day.[48][49] On most summer afternoons a sea breeze, known locally as the "Fremantle Doctor", blows from the southwest, providing relief from the hot north-easterly winds. Temperatures often fall below 30 °C (86 °F) a few hours after the arrival of the wind change.[50] In the summer, the 3 pm dewpoint averages at around 12 °C (54 °F).[48]
Winters are wet but mild, with most of Perth's annual rainfall being between May and September. The lowest temperature recorded in Perth was −0.7 °C (30.7 °F) on 17 June 2006.[49] The lowest temperature within the Perth metropolitan area was −3.4 °C (25.9 °F) on the same day at Jandakot Airport. However, temperatures at or below zero are very rare occurrences and it seldom gets cold enough for frost to form.[51]
The rainfall pattern has changed in Perth and southwest Western Australia since the mid-1970s. A significant reduction in winter rainfall has been observed with a greater number of extreme rainfall events in the summer months,[52] such as the slow-moving storms on 8 February 1992 that brought 120.6 millimetres (4.75 in) of rain, the highest recorded in Perth,[49][50] and a severe thunderstorm on 22 March 2010, which brought 40.2 millimetres (1.58 in) of rain and caused significant damage in the metropolitan area.[53]
| [hide]Climate data for Perth, Western Australia | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 45.8 (114.4) |
46.2 (115.2) |
42.4 (108.3) |
37.6 (99.7) |
34.3 (93.7) |
28.1 (82.6) |
26.3 (79.3) |
27.8 (82) |
34.2 (93.6) |
37.3 (99.1) |
40.3 (104.5) |
44.2 (111.6) |
46.2 (115.2) |
| Average high °C (°F) | 31.3 (88.3) |
31.7 (89.1) |
29.6 (85.3) |
25.9 (78.6) |
22.3 (72.1) |
19.4 (66.9) |
18.4 (65.1) |
19.1 (66.4) |
20.4 (68.7) |
23.4 (74.1) |
26.6 (79.9) |
29.1 (84.4) |
24.8 (76.6) |
| Daily mean °C (°F) | 24.8 (76.6) |
25.1 (77.2) |
23.1 (73.6) |
19.9 (67.8) |
16.4 (61.5) |
14.0 (57.2) |
13.1 (55.6) |
13.7 (56.7) |
15.0 (59) |
17.5 (63.5) |
20.5 (68.9) |
22.8 (73) |
18.8 (65.8) |
| Average low °C (°F) | 18.2 (64.8) |
18.4 (65.1) |
16.6 (61.9) |
13.8 (56.8) |
10.5 (50.9) |
8.6 (47.5) |
7.7 (45.9) |
8.3 (46.9) |
9.6 (49.3) |
11.5 (52.7) |
14.3 (57.7) |
16.4 (61.5) |
12.8 (55) |
| Record low °C (°F) | 8.9 (48) |
8.7 (47.7) |
6.3 (43.3) |
4.1 (39.4) |
1.3 (34.3) |
−0.7 (30.7) |
0.0 (32) |
1.3 (34.3) |
1.0 (33.8) |
2.2 (36) |
5.0 (41) |
7.9 (46.2) |
−0.7 (30.7) |
| Average rainfall mm (inches) | 15.4 (0.606) |
8.8 (0.346) |
20.5 (0.807) |
36.5 (1.437) |
90.2 (3.551) |
126.7 (4.988) |
144.7 (5.697) |
122.4 (4.819) |
88.0 (3.465) |
38.6 (1.52) |
23.7 (0.933) |
9.9 (0.39) |
730.5 (28.76) |
| Average precipitation days | 2.4 | 2.1 | 4.1 | 6.7 | 11.1 | 15.2 | 16.9 | 15.7 | 15.3 | 8.7 | 6.3 | 3.9 | 108.4 |
| Average relative humidity (%) | 39 | 38 | 39 | 46 | 50 | 56 | 57 | 54 | 53 | 46 | 44 | 41 | 47 |
| Mean monthly sunshine hours | 360.6 | 314.9 | 295.5 | 246.0 | 211.7 | 180.6 | 188.4 | 219.8 | 232.4 | 299.8 | 320.4 | 359.4 | 3,229.5 |
| Mean daily sunshine hours | 11.5 | 11.0 | 9.6 | 8.3 | 6.9 | 5.9 | 6.1 | 7.2 | 7.7 | 9.6 | 10.6 | 11.5 | 8.8 |
| Source: Bureau of Meteorology[54][55][56] Temperatures: 1993–2015; Extremes: 1897–2015; Rain data: 1876–2012 |
|||||||||||||
| [show]Climate data for Fremantle |
|---|
| [show]Climate data for Kalamunda |
|---|
| [show]Climate data for Jandakot Airport |
|---|
Isolation
Perth is one of the most isolated major cities in the world. The nearest city with a population of more than 100,000 is Adelaide, 2,104 kilometres (1,307 mi) away. Only Honolulu (population 953,000), 3,841 kilometres (2,387 mi) from San Francisco, is more isolated.Perth is geographically closer to both Dili, East Timor (2,785 kilometres (1,731 mi)), and Jakarta, Indonesia (3,002 kilometres (1,865 mi)), than to Sydney (3,291 kilometres (2,045 mi)), Brisbane (3,604 kilometres (2,239 mi)), or Canberra (3,106 kilometres (1,930 mi)).
Demographics
| [show]Historical populations |
|---|
Ethnic groups
One dot represents 100 persons born in:
United Kingdom (dark blue),
China (red),
Italy (light green),
Malaysia (dark green),
South Africa (brown),
Singapore (purple) and
Vietnam (yellow), based on 2006 Census.
United Kingdom (dark blue),
China (red),
Italy (light green),
Malaysia (dark green),
South Africa (brown),
Singapore (purple) and
Vietnam (yellow), based on 2006 Census.
Perth's population is notable for the high proportion of British and Irish born residents. At the 2006 Census, 142,424 England-born Perth residents were counted,[64] narrowly behind Sydney (145,261),[65] despite the fact that Perth had just 35% of the overall population of Sydney.
The ethnic make-up of Perth changed in the second part of the 20th century, when significant numbers of continental European immigrants arrived in the city. Prior to this, Perth's population had been almost completely Anglo-Celtic in ethnic origin. As Fremantle was the first landfall in Australia for many migrant ships coming from Europe in the 1950s and 1960s, Perth started to experience a diverse influx of people, including Italians, Greeks, Dutch, Germans, Croats. The Italian influence in the Perth and Fremantle area has been substantial, evident in places like the "Cappuccino strip" in Fremantle featuring many Italian eateries and shops. In Fremantle the traditional Italian blessing of the fleet festival is held every year at the start of the fishing season. In Northbridge every December is the San Nicola (Saint Nicholas) Festival, which involves a pageant followed by a concert, predominantly in Italian. Suburbs surrounding the Fremantle area, such as Spearwood and Hamilton Hill, also contain high concentrations of Italians, Croatians and Portuguese. Perth also has a small Jewish community – numbering 5,082 in 2006[62] – who have emigrated primarily from Eastern Europe and more recently from South Africa.
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