Historical clue formulations

• Bank worry — 2024-04-20
• Beach problem — 2021-06-02
• Beachfront property woe — 2018-10-22
• Bank trouble? — 2018-06-03
• Natural process illustrated by the last words of 18-, 24-, 37-, 54- and 61-Across — 2018-01-22
• Shoreline problem — 2016-01-31
• Soil problem — 2013-05-27
• Wearing away of soil — 2013-03-11
• Gradual decline — 2013-01-20
• Wind and rain cause it — 2007-11-14
• Bank problem — 2005-12-29
• Beach problem — 2004-11-13
• Shoreline problem — 2001-09-17
• Shoreline problem — 2000-02-23
• Gradual deterioration — 1994-07-10