London Fire Brigade has declared a major incident in response to the volume of 999 calls over Storm Eunice, APA reports citing BBC.
It said 550 calls were taken in 2.5 hours today - more than the average number usually taken in a 24-hour period.
Meanwhile, South Central Ambulance Service also declared a critical incident, warning that disruptions on the roads were affecting response times.
Paul Jefferies, assistant director of operations, said declaring a critical incident allows services to seek further support, adding that they will focus on reaching patients with life-threatening or serious injuries and illnesses first.