Basement still full of snow

The basement still has about 1-2" of icy snow, from the storm before we installed the house. We melted the first 6" with a large propane heater (serious carbon monoxide hazard), then switched to calcium chloride which made some progress over the weekend. But it's going to be cold this week, so I doubt we're going to get it melted and ready to pour the concrete slab floor.