Bare films will fuse together permanently if allowed to dry in contact with each other. Cover them with plastic to prevent partial drying until they can be frozen or salvaged. Image surfaces are susceptible to mold and physical damage, especially at high temperatures.
Local commercial photo labs that offer traditional photographic processing may be used to rewash and dry photographic transparencies and film negatives.
Precautions: Handle carefully; gelatin image surfaces swell and soften when wet. Do not touch sticky image surfaces with bare hands. Handle slides by mount edges. Do not tightly compress items.