The Summit Tunnel fire, one of the largest transportation tunnel fires in history, burns after a freight train carrying over one million liters of gasoline derails near the town of Todmorden, England, in the Pennines.

The Summit Tunnel fire occurred on 20 December 1984, when a dangerous goods train caught fire while passing through the Summit Tunnel on the railway line between Littleborough and Todmorden on the Greater Manchester/West Yorkshire border, England.

Rail freight transport is the use of railways and trains to transport cargo as opposed to human passengers.

Gasoline or petrol is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines. When formulated as a fuel for engines, gasoline is chemically composed of organic compounds derived from the fractional distillation of petroleum and later chemically enhanced with gasoline additives. It is a high-volume profitable product produced in crude oil refineries.

Todmorden is a market town and civil parish in the Upper Calder Valley in Calderdale, West Yorkshire, England. It is 17 miles north-east of Manchester, 8 miles (13 km) south-east of Burnley and 9 miles (14 km) west of Halifax. In 2011, it had a population of 15,481.

The Pennines, also known as the Pennine Chain or Pennine Hills, are a range of uplands mainly located in Northern England. Commonly described as the "backbone of Britain" because of its length and position, the mountain range runs from Derbyshire and Staffordshire in the north of the Midlands to Northumberland in North East England. From the Tyne Gap in the north, the range extends south through the North Pennines, Yorkshire Dales, South Pennines, and Peak District to end near the valley of the River Trent. The Border Moors and Cheviot Hills, which lie beyond the Tyne Gap, are included in some definitions of the range.