 The precursor to Kyle produced record breaking rains over Puerto Rico from September 21 to 23 . With isolated maxima in excess of 30 inches ( 760 mm ) , rivers breached their flood walls and flooded low @-@ lying areas . In Patillas , a 500 @-@ year 24 ‑ hour rainfall event took place , with 22 @.@ 03 in ( 559 @.@ 5 mm ) falling from 8 a.m. on September 21 to 8 a.m. on September 22 . Some rivers rose more than 25 ft ( 7 @.@ 6 m ) in 12 hours , leading to severe flooding . Three deaths were directly blamed on the system as a result of the floods and mudslides . Another three deaths were indirectly related due to stress induced heart attacks . Mudslides , triggered by the torrential rain , closed highways and schools . Damage to agriculture on the island was estimated to be $ 23 million and structural damage was estimated at $ 25 million , for a total of $ 48 million . In addition to the system 's rainfall , its winds whipped up 10 ft ( 3 m ) waves along the island 's southern coast . 
