Kalgoorlie has had its hottest start to October on record with days feeling more like summer than spring. The first four days of October exceeded 33 degrees, making it the earliest October heat spell in over 70 years of records. For the entire month of October, a four day heat spell over 33 degrees hasn’t occurred since 1995. This heat over Western Australia's interior was due to a slow moving high pressure system across the country. The high directed warm easterly winds across Central Australia, allowing heat to build up as it head west. A low pressure trough over Western Australia’s west coast trapped this heat as gusty northerly winds dragged the heat south over Kalgoorlie. The trough moved across the Goldfields on Sunday allowing the heat to peak at 36 degrees before bringing a dramatic drop in daytime temperatures today. Today will only warm to the high 20s, a noticeable eight degrees colder than yesterday. Tomorrow will be the coldest day of the week, just warming over the 20 degree mark. Another bout of heat isn't far off though as it starts to build from Wednesday, peaking in the mid-to-high 30s over the weekend.