A Flood Alert was issued for Blackburn Brook in Barnsley, Rotherham, Sheffield on 27th August 2026. Affected watercourses included the Blackburn Brook.
During this event, FloodRadar monitoring gauges recorded notable rises. The Bagley Dike at Grimesthorpe rose 1.45m, peaking at 1.51m, while the Blackburn Brook at Sheffield Wincobank climbed 1.17m.
Environment Agency advice issued
Rising river levels today may lead to flooding. Flooding is possible on 27 August 2026 due to the heavy and thundery downpours expected today. Locations most affected will be low lying land and roads near rivers. We are closely monitoring the situation as river levels may rise suddenly and cause surface water flooding. Take care and avoid walking, cycling or driving through flood water . This message will be updated by 11:00PM on 27 August 2026 or as the situation changes.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Grimesthorpe | Bagley Dike | +1.45m | 1.51m |
| Sheffield Wincobank | Blackburn Brook | +1.17m | 1.03m |
| Rotherham | River Don | +1.11m | 1.11m |
| Sheffield Blackburn | Blackburn Brook | +0.93m | 0.98m |
| Rotherham Forge Island | River Don | +0.80m | 0.96m |
| Hadfields | River Don | +0.56m | 0.88m |
| Malinbridge | River Loxley | +0.47m | 0.69m |
| Ecclesfield Morrisons | Whitley Brook | +0.38m | 0.33m |
| Wharncliffe Side | River Don | +0.24m | 1.09m |
| High Green | Charlton Brook | +0.21m | 0.21m |