LONDON — A severe weather event gripping Britain and Ireland left hundreds of thousands without electricity and prompted warnings for millions to remain indoors on Saturday due to strong winds and heavy precipitation.

Wind gusts reaching 93 miles per hour were reported, leading officials to issue a rare emergency alert to around 3 million households in Wales and the southwest of England early on Saturday morning.

This official warning, accompanied by a loud alarm, urged residents to stay inside and was disseminated to all mobile devices compatible within the storm’s affected regions as Storm Darragh moved through.

On Friday, the Met Office, the U.K.’s national weather service, assigned a red weather warning, which is designated as the highest level of alert. Countless homes, particularly in Northern Ireland, Wales, and parts of western England, experienced power outages throughout the night.

In response to the inclement weather, major roadways and bridges were closed, and numerous train services across the country were put on hold.

In Ireland, nearly 400,000 residential properties, agricultural lands, and businesses were left without electricity due to the storm’s impact. Furthermore, some flights from Dublin Airport were canceled as a result of the adverse conditions.