SAN JUAN, Puerto Rico (AP) — Tropical Storm Bertha swirled through the eastern Caribbean on Friday night as it unleashed heavy rains and strong winds in the region, knocking out power on some islands.

The storm’s maximum sustained winds held at 50 mph (85 kph), and no significant change in strength was expected over the next two days. Bertha was centered about 180 miles (295 kilometers) southeast of St. Croix in the U.S. Virgin Islands and was moving west-northwest at 22 mph (35 kph) late Friday.