Unseasonal snow has fallen in some parts of the US, while other parts of the country brace for a heatwave this week.
A strong cold front spread into the western US from the northern Pacific over the weekend, bringing an abrupt change in conditions to a region that had been experiencing high summer temperatures amid drought. Temperatures from the Canadian border to California have widely been 5-10C below the norm since Friday, and more than 10C below in some parts farther north. The pattern is expected to remain for much of the coming week.
