Heat dome

Heat dome occurs when the atmosphere traps hot ocean air like a lid or a cap. It often occurs during the La Nina years, when the waters in eastern Pacific are cool and the western Pacific is warm. The consequence of this temperature difference is that the warm air gets trapped in the jet stream – an air current that spins counter-clockwise around the globe and reaches the US west coast.

Most of the British Columbia, northern Alberta and several parts of Yukon and Northwest Territories in Canada are currently experiencing a “heat dome” that is expected to last for several days and break the heat records.

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