What are the key statistics from Janis Elspas's documentation of Hurricane Irma's impact on historic landmarks in Puerto Rico?

Based on the available content, Janis Elspas has documented the threat of Hurricane Irma to historic landmarks in Puerto Rico, particularly the Castillo de San Cristobal. This fort, built by Spain and completed in 1783, is the largest fortification ever built by the Spaniards in the New World. Janis expressed hope that the hurricane would spare the beautiful people, the land, and the many historic places of Puerto Rico. However, specific statistics or details about the hurricane's impact on these landmarks aren't provided in the content I have.

Would you like to know more about the history of Castillo de San Cristobal or other historic landmarks in Puerto Rico?