You should be very careful blending hot liquids and should never blend them in a blender fully/tightly covered. When the blender starts whirring up the hot liquids the heat builds up and the steam, needing somewhere to go, will quickly blow the lid off the blender.

You can blend safely if you remove the center covering which will allow the steam the vent it needs. Cover the vent hole lightly with a cloth to allow for a gentle venting as well as to keep the liquids from spewing forth and causing burns.

When using an immersion blender make sure you keep the blending part immersed. If lifted above the hot liquid spattering and burns could occur.

Look not mournfully into the past. It comes not back again. Wisely improve the present. It is thine. Go forth to meet the shadowy future, without fear. {Henry Wadsworth Longfellow}