Thousands without power as Ernesto exits Bermuda

Hurricane Ernesto lashed Bermuda with heavy rains and strong winds on Saturday, leaving much of the British Atlantic Ocean territory without power before continuing on its path toward eastern Canada.

The hurricane, which hit Puerto Rico earlier this week, was "inching away from Bermuda" but still creating powerful tropical storm conditions as of Saturday evening, according to the US-based National Hurricane Center.

It made landfall at 5.30am local time packing maximum sustained winds of 137kmph the NHC said.

"We continue to pass through the southwestern quadrant of Ernesto," the Bermuda Weather Service said on Saturday evening, adding that the island was "experiencing occasional squally showers" and warning that seas would remain hazardous through the night.

Ernesto was located some 85 miles northeast of the island as of 6pm local time and expected to dump 175 to 225 millimetres of rain on Bermuda overall.

"This rainfall will likely result in considerable life-threatening flash flooding to the island, especially in low-lying areas," the NHC said.

The storm had left nearly 26,000 customers without electricity, Bermuda's power firm Belco reported, or more than 70 per cent of its customers on the island with a population of 64,000.

Images on social media showed downed trees blocking roads, power lines damaged by the storm's high winds and flooded roads.

It warned that dangerous beach conditions are expected along the US East Coast through next week.