Cuban officials agree, and have notified him and 11 other families in the building that they will be relocated, though no date has been set. Rodriguez and several other residents said they didn't mind, given the danger.
Since 2000, Cuba has had a coastal protection law on the books that prohibits construction on top of sand and mandates a 130-foot-wide (40-meter) buffer zone from dunes. Structures that predate the measure have been granted a stay of execution, but are not to be maintained and ultimately will be torn down once they're uninhabitable.
Serious enforcement only began in earnest in recent months, as officials came armed with the risk assessment.
Some 10,000 sanctions and fines have been handed down for illegal development, according to Alvarez. Demolitions have so far been limited to vacation rentals, hotel annexes, social clubs, military installations and other public buildings rather than private homes.
"Less strict measures have been taken with the people," Alvarez said, acknowledging that relocating communities is tough in a country with a critical lack of adequate housing.
One flashpoint is the powdery-white-sand resort of Varadero, a two-hour's drive east of the capital, where lucrative hotels attract hundreds of thousands of visitors each year from Canada, Europe and Latin America.
Some 900 coastal structures have been contributing to an average of about 4 feet (1.2 meters) of annual coastline erosion, according to geologist Adan Zuniga of Cuba's Center for Coastal Ecosystems Research, a government body. Building solid structures on top of dunes makes them more vulnerable to the waves.
"These are violent processes of erosion," Zuniga said about regional development. "In many places the beaches are receding 16 feet (5 meters) a year."
Varadero symbolizes Cuba's dilemma: Tearing down seaside restaurants, picturesque pools and air-conditioned hotels threatens millions of dollars in yearly tourism revenue, but allowing them to stay puts at risk the very beaches that were the draws in the first place.
Cuban officials have tried to get around that choice by replenishing lost sand in Varadero, with plans to do the same next year at the Cayo Coco resort. But beach replenishment is an expensive remedy that Cuba can little afford to carry out nationwide. Zuniga said it costs $3 to $8 per cubic meter, and a single beach might contain up to 1 million cubic meters of sand.
The measure will still be necessary at Cayo Coco although the resort was developed with environmental mitigations such as keeping hotels behind the tree line and running a hydraulic system that keeps water circulating properly in an inland lagoon.
There are no publicly available figures on how many structures have been or will be razed across Cuba. Alvarez and Zuniga said officials are evaluating problem buildings on a case-by-case basis, taking into account the needs of local economic development.
They say nothing is off-limits; even the emblematic Hotel Internacional, a four-story resort built in 1950 as a sibling to the Fontainebleau in Miami, has been doomed to demolition in Varadero at an unspecified date.
Other installations are gradually being moved inland, and government officials are applying stricter oversight on new construction, they said. In May, authorities unveiled the near-completed Hotel Melia Marina Varadero and yacht club, which lies at a safe remove from the sea.
Cuba's Communist government wields a unique advantage, one no other country in the region claims: The government and its subsidiaries control the island's entire hotel stock, sometimes teaming with minority foreign partners on management. Cuba's military-run Gaviota Group alone controls more than three-dozen major hotels.
So when the government makes up its mind to tear down a hotel, it can do so without having to worry about fighting a lengthy court battle against a displaced owner.