|LV CC Division Two, Chelmsford|
|Close, day three: Glamorgan 322, Essex 240-2|
|Essex 4pts, Glamorgan 3pts|
Jaik Mickleburgh led promotion-chasing Essex's charge against Glamorgan before rain curtailed play and left the match heading for a draw.
Resuming day three on 107-1, the hosts saw Greg Smith fall for just 16, caught at gully off Michael Hogan early on.
But Mickleburgh (124 not out) scored his second first-class ton of the summer and put on 108 with Owais Shah (59 not out).
However, rain meant there was no play after lunch with Essex on 240-2.
The home side will still have one eye on Northants' game against Kent, which also looks destined to end in a draw.
Essex started this round of games 21 points behind second-placed Northants and now may have to rely on a dramatic change in circumstances to achieve promotion.
If both matches do end in a draw, it means that Essex will go into next week's final round of fixtures needing a resounding win against Hampshire and a heavy Northants defeat at Worcester to have any chance of being promoted.