Side yard looks like gravel stream bed this morning

We have had very little rain here for the past 6 weeks so the gravel in the side yard around the new garage was packed hard.  Yesterday the gravel was all loosened as they backfilled around and in the new structure.  Last night the rain started and will continue all day as squalls roll through with heavy downpours.  Consequently, the side yard has deep channels as the water finds the easiest route downhill, hopefully not undermining the new garage foundation.