SAN JUAN, Puerto Rico (AP) — Tropical Storm Bertha aimed for the Bahamas and the Turks and Caicos islands early Sunday as its heavy rains and wind led to the cancellation of flights and caused power outages in parts of the Caribbean.

The storm had maximum sustained winds of 45 mph (75 kph), and slow strengthening was expected by Monday. Bertha was centered 70 miles (110 kilometers) east-southeast of Puerto Plata in the Dominican Republic and was moving northwest at 22 mph (35 kph) late Saturday night.