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2015 North American heat wave

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The 2015 North American heat wave affected the Northwest United States and southern British Columbia dyring the period 9 June - 3 July 2015. During the heat wave, many all-time and monthly-record highs as well as record highs & lows were measured.[1][2] In Canada, the heat wave mostly affected the Lower Mainland, and the Southern Interior.[citation needed]

Records[edit | edit source]

Date Country State/Province Location Temperature Type of record R
28 June United States Washington Bridgeport 113 °F (45 °C)
  • All-time record high
  • State monthly record high
28 June United States Washington Lacrosse 113 °F (45 °C)
  • All-time record high (tied)
  • State monthly record high
28 June United States Washington Walla Walla 113 °F (45 °C)
  • All-time record high
  • State monthly record high
18 June United States Washington John Day Dam 112 °F (44 °C) Monthly record high
9 June United States Oregon Hermiston 112 °F (44 °C) Monthly record high
10 June Monthly record high (tied)
28 June 111 °F (44 °C) Daily record high
18 June United States Idaho Lewiston 111 °F (44 °C) Monthly record high
28 June United States Washington Pasco 111 °F (44 °C) All-time record high
28 June United States Idaho Boise 110 °F (43 °C) Monthly record high
28 June United States Washington Chelan 110 °F (43 °C) All-time record high
28 June United States Washington Ephrata 110 °F (43 °C) Monthly record high
27 June United States Oregon Grants Pass 110 °F (43 °C) Monthly record high
28 June United States Washington Omak 110 °F (43 °C) Monthly record high
28 June United States Washington Kennewick 109 °F (43 °C) Daily record high
27 June United States Oregon Pendleton 109 °F (43 °C) Monthly record high
28 June Monthly record high (tied)
28 June United States Washington Wenatchee 109 °F (43 °C) All-time record high (tied)
28 June United States Washington Bickleton 108 °F (42 °C) All-time record high
26 June United States Washington The Dalles 108 °F (42 °C) Monthly record high
28 June United States Washington Ellensburg 108 °F (42 °C) Monthly record high
28 June United States Washington Richland 108 °F (42 °C) Daily record high
28 June United States Washington Spokane Valley 108 °F (42 °C) Monthly record high
27 June United States Washington Yakima 108 °F (42 °C) Monthly record high
28 June Monthly record high (tied)
27 June Canada British Columbia Osoyoos 106 °F (40.9 °C) Monthly record high
28 June United States Idaho Bonners Ferry 105 °F (41 °C) All-time record high
27 June United States Washington Spokane 102 °F (39 °C) Monthly record high
28 June 105 °F (41 °C) Monthly record high
28 June Canada British Columbia Ashcroft 104 °F (40 °C) Monthly record high
28 June United States Washington Pullman 104 °F (40 °C) Monthly record high
27 June United States Montana Helena 103 °F (39 °C) Monthly record high
27 June United States Oregon Burns 102 °F (39 °C) Monthly record high
28 June United States Idaho Coeur d'Alene 102 °F (39 °C) Monthly record high
28 June United States Montana Kalispell 102 °F (39 °C) Monthly record high
28 June United States Montana Missoula 102 °F (39 °C) Monthly record high
26 June United States Oregon Summer Lake 102 °F (39 °C) Monthly record high
28 June United States Oregon Meacham 101 °F (38 °C) Monthly record high
26 June United States Oregon Redmond 101 °F (38 °C) Monthly record high
26 June United States California Mount Shasta 99 °F (37 °C) Monthly record high
30 June Monthly record high (tied)
3 July United States Oregon Portland 95 °F (35 °C) Daily record high

Wildfires[edit | edit source]

The heat wave was responsible for multiple wildfires in the Southern Interior of British Columbia. The heat wave was also most notably responsible for causing the worst wildfire season in Washington state history,[3][4] of which almost all fires occurred in Eastern Washington. Eastern Oregon also experienced an abnormally severe wildfire season, although temperatures here were lower due to higher elevations and many of the fires were actually caused by lightning strikes.[5] The heatwave caused the summer to start off dry, making the rest of the wildfire seasons in both states far worse than normal.[6] Overall, the largest fires occurred in the Okanagan Valley of Eastern Washington and British Columbia.[citation needed]

References[edit | edit source]



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