The Pacific Ocean sits less than 15 miles from most Los Angeles properties. That proximity creates morning marine layers that push humidity above 70 percent in coastal and central neighborhoods from May through October. High ambient humidity slows evaporation because the air already holds significant moisture. A structure that would dry in three days in Phoenix or Las Vegas can take five days in Mar Vista or Culver City. Dehumidifiers must work harder and longer to lower relative humidity enough to create the vapor pressure differential needed for efficient drying. If you skip professional equipment and rely on box fans, drying time can stretch to weeks and create ideal conditions for mold colonization.
Los Angeles also has a large inventory of older housing stock. Homes built before 1950 often feature lathe-and-plaster walls, which absorb and hold moisture longer than modern drywall. These older structures also lack the vapor barriers required by current building codes, allowing moisture to migrate through wall assemblies and settle in framing lumber. Restoration companies unfamiliar with Los Angeles construction may underestimate drying time for these older homes, leading to incomplete drying and long-term structural damage. Choosing a local restoration provider who understands pre-war construction techniques and coastal climate challenges ensures accurate drying timelines and complete moisture removal.