At 7.30am this morning the road was reopened southbound between Junction 5, Droitwich, and Junction 6, Worcester, but as only one of four lanes is open motorists have been advised to expect delays of up to one hour.
A spokesperson for Highways England said: "The lane closures are expected to remain in place for some time with delays of 60 minutes on the approach at this time.
"If this closure impacts on your planned route, please allow extra journey time. Plan ahead, you may wish to re-route or even delay your journey."
Queues have been stretching back to Junction 4A, M42, as traffic tries to get past the scene of the blaze.
Firefighters used foam attack, four breathing apparatus, and two hose reels to fight fire.
Further information is available from Highways England by visiting our www.trafficengland.com website and travel apps, or via our regional twitter feed. Our 24/7 contact centre team is also available to provide up to the minute information on 0300 123 5000.
UPDATE-The #M5 south J5-J6 has been reopened following an earlier fire. 3 of (4) remain closed for vehicle recovery.For further info please see: https://t.co/We6bV7SfLe .Delays of 60 minutes on the approach so please allow extra time for your journey. @WMerciaPolice @WestMidsFire pic.twitter.com/SNcDPb5DQ3— National Highways: West Midlands (@HighwaysWMIDS) October 11, 2021