LONDON—Storm Dennis roared across Britain with high winds and heavy rains Sunday, prompting authorities to issue some 350 flood warnings, including a “red warning” alert for life-threatening flooding in south Wales.
The Met Office, Britain’s meteorological service, only issues its highest warning when it thinks the weather will be so bad there’s a “danger to life.” It’s the first time the service has issued such a warning since December 2015. Hours later, the alert level was downgraded to “amber,” which still warns of significant impact from flooding.
