By Ivelisse Rivera SAN JUAN, Puerto Rico (Reuters) – The entire island of Puerto Rico was without power on Sunday as Hurricane Fiona made landfall and threatened to cause “catastrophic flooding” and landslides before barreling toward the Dominican Republic, a government agency said. The center of the storm made landfall on the southwestern coast of Puerto Rico near Punta Tocon at 3:20 p.m. ET (1920 GMT) with maximum sustained winds of about 85 miles per hour (140 kilometers per hour), clearing the threshold for a Category 1 hurricane, the National Hurricane Center said. Electricity was out acr…