1899 San Ciriaco hurricane
The hurricane weakened slightly while moving west-northward across the Caribbean Sea and made landfall in Guayama, Puerto Rico late on August 8 with winds of 140 mph (220 km/h). August 8 was the namesday of Saint Cyriacus, hence the hurricane's nickname. Several weather stations across the island reported low barometric pressures, with a reading as low as in Guayama. Wind shifts were also experienced across the island, primarily in the south and the west. The storm crossed Puerto Rico in approximately six hours and emerged into the Atlantic Ocean late on August 8, while weakening to a Category 3 hurricane, with winds decreasing to 120 mph (195 km/h). The hurricane would maintain this intensity for more than nine days. Continuing west-northward, the hurricane brushed the north coast of Dominican Republic on August 9. Thereafter, the system moved slowly northwestward through the Bahamas, striking Inagua on August 10 and Andros Island on August 12. According to telephone and telegraph reports from the Weather Bureau, the storm was predicted to make landfall in Florida.
Hurricane Jeanne
Puerto Rico was impacted by tropical storm force winds and heavy rain, with flooding on a historic scale. The storm made landfall near Maunabo midday on September 15. The storm generally moved northwest through the island, exiting on the northwest coast near the town of Mayagüez around 11 p.m. Jeanne passed directly over the towns of Arroyo, Patillas, Guayama and Salinas on its trip over the Commonwealth. San Juan reported a wind gust of , Carolina reported gusts to , and rainfall ranged from in the city to over in Vieques. This excessive rainfall resulted in damage to roads, landslides, and collapsed bridges. This resulted in one death and the evacuation of 400 people near the Río Grande de Añasco. A total of eight people were reported dead in Puerto Rico as a result of Jeanne. Damages from the storm were estimated at $169.5 million (2004 USD).