One person has been rescued from Dovestone Reservoir and another is missing after unconfirmed reports of a vessel capsizing.
Police in Oldham said that a massive emergency services response – including the Coastguard and Mountain Rescue - is still searching for a second person who they believe is still missing.
“Emergency services are currently responding to reports of two people going into water at Dove Stone Reservoir," said a spokesperson for Greater Manchester Police.
“One person has been recovered and is currently being treated. Attempts are ongoing to locate the second person.
“People are kindly asked to please avoid the area at this time.”
Greater Manchester Fire and Rescue Service have sent several units to the reservoir: “At shortly before 2.30pm today (Sunday 20 October) fire crews were called to Dove Stone Reservoir in Oldham following reports of a person in the water.
“Three fire engines from Mossley, Stalybridge, and Eccles along with the Water Incident Unit from Leigh quickly attended the scene.
“Crews are working alongside emergency service colleagues and remain in attendance.”
Conditions on the reservoir near Greenfield will have been made more difficult by the arrival of Storm Ashley, which has brought heavy rain and wind gusting up to 80mph.
A Coastguard spokesperson also confirmed their participation in the rescue efforts, in which GMP have taken the lead: "HM Coastguard has been assisting the police with an incident Dove Stone Reservoir. A coastguard helicopter was sent."
This is a breaking news story. More details will be added as new information becomes available.