Structural Drying & Dehumidification in Tupelo, MS

Worse here than the tarp suggests, because of what follows. This area gets substantial rain through the cool months and long frontal systems rather than brief storms, so a temporary covering has to hold through days of continuous rain rather than an afternoon. Water that gets past it soaks insulation and ceiling framing repeatedly. Getting a properly fastened temporary covering, rather than a weighted tarp, is worth insisting on when the permanent repair is weeks out.

Because the wettest months here are the ones with the least evaporation. December frontal rain soaks heavy prairie clay to depth, and with short days and cool temperatures very little of it comes back out. The soil sits at capacity from midwinter into spring. That is also when foundations see the most consistent moisture pressure, which is the opposite of the summer-storm pattern people expect in the Deep South.

In behavior, yes, closely enough that it matters. Black Prairie clay shrinks and cracks in dry weather and swells when wet, and it moves foundations the same way. The practical consequences are the same too: keep moisture around a foundation as even as possible, keep downspouts discharging well away from it, and treat sudden interior wetness as a possible plumbing failure caused by movement rather than only as a drainage problem.