A police cordon remains in place at the scene of a suspected gas blast in Wright Street, Newark.
Work is continuing to remove roof slates and bricks from the houses affected while forensic investigations take place.
Building Control Services from Newark and Sherwood District Council will be doing the controlled demolition of the supporting walls and the rest of the roof structure on the two neighbouring properties.
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"Leah hasn't been seen since Saturday so of course we're all concerned for her safety and welfare."
Another fine day is expected on Tuesday after a frosty start. Plenty of sunshine but still rather chilly. Perhaps one or two light showers.
Starting frosty but gradually becoming less cold, with a northerly breeze. Becoming cloudy at times, with sleet and later rain showers.