(Decanter) - Several parts of South Australia are facing 'catastrophic' fire risks over the next few days as temperatures across the region are expected to hit near-record levels. Dozens of firefighters are already battling to keep a fire under control in the Sevenhill area of the Clare Valley, while temperatures in Adelaide are forecast to hit 44C tomorrow (Friday) – with the heatwave expected to last more than a week. The Clare Valley blaze, which has so far remained within fire control lines, is burning across the wooded slopes overlooking vineyards near Sevenhill. To date no damage to vines or wineries has been reported.