We were very droughty this year, blessed to have good air quality (even though we were choking on wildfire smoke all summer).
Also these trees are within 50 yards from the sound, on a sand spit. The whole property floods with the winter rains and high tides raising the water table. The water drains in a matter of days (not weeks or months).
Drainage work is on the books, and I recommended arbor chips/RCX + vertical mulching