San Juan – A massive blackout left at least 261,245 customers out of power in various regions of Puerto Rico this afternoon. According to the report, the most affected regions include Bayamón with 55,974 customers without electricity, followed by Caguas with 96,098 and Carolina with 36,058. In San Juan, 39,063 customers remain without service, while in Ponce the figure amounts to 13,658. In Arecibo and Mayagüez, the number affected is 6,399 and …