54″ in 24hr is more than ‘plenty’… it’s like camping under Niagara Falls! A river of wet tropical air sucked up from the south and impacting our mountains. My steel roof was thundering from the waterfalls… all night long. With an average of over 2″ per hour that day, sometimes it was lighter and sometimes heavy with the passing bands. At one point I clocked one hour with 4.5″ rain.
You’re right, I’m at 300ft elevation and a couple miles inland. The 54″ rainfall showed me I got good drainage lava tubes under me. I’m kinda wind protected here also with the forest all around.
Biggest hurricane worry out here in the boonies is treefall cutting off road access and powerlines. I got a chainsaw, solar, and a generator for those needs.