Original article from Kent Live
The incident happened near the Darenth interchange at junction 2 today (July 18) and saw debris spread across the motorway.
The motorway was subsequently closed in both directions between J1A and J2.
Traffic has been at a standstill for most of the afternoon, with queues stretching for miles.
Signing up to the KentLive newsletter means you'll get the latest news direct to your inbox twice a day.
It couldn't be simpler and it takes seconds – simply press here, enter your email address and follow the instructions. You can also enter your email address in the box below the picture on most desktop and mobile platforms.
You can also sign up to our website and comment on our stories by pressing here and signing in.
Further delays have been caused by debris across the motorway after a bridge was reportedly struck in the crash.
The emergency services said they are working tirelessly in the scorching temperatures to clear the incident.
Meanwhile, people have spilled onto the motorway to escape the sweltering heat inside their cars.
There are 90 minute delays and traffic is not expected to return to normal until at least 7pm, according to Highways England.
KentLive has contacted the emergency services for an update.
If you have seen or heard anything you think we should know about, or in relation to this, please contact the KentLive newsdesk by email at email@example.com
You can sign up for all the latest news from across Kent via the daily newsletter here.