Chris Basham's late strike looked to have given Blackpool their third successive league win, but it was Middlesbrough's Marvin Emnes who had the last say equalising deep into stoppage time.
Paul Ince made two changes to the starting line-up bringing in Angel Martinez for Michael Chopra and handing a debut to Neal Bishop, who came in for Bobby Grant.
The rain was teaming down before the match and it continued to fall well into the game making for an extremely greasy and slippery surface.
Mustapha Carayol started on the left for the home side and was looking very dangerous in the early stages, continuing to want to come inside onto his right foot, but his first two shots were tame.
Steven Davies was employed as the lone Pool striker and it was he who was the first to test Jayson Leutwiler; after receiving the ball from Martinez he swivelled away from his man but his curling effort was plucked out of the air by the keeper.
In the 25th minute all sides of the Riverside Stadium were on their feet as a minute's applause rang out for former Boro and Pool player Gary Parkinson, with the whole ground sending their best wishes to Gary and his family as he continues his battle against locked-in syndrome.
Soon after Blackpool almost got their noses in front when Gary MacKenzie's downward header was helped goalwards by Bishop and despite it beating the goalkeeper, Dean Whitehead was back on the line to clear the ball away.
HALF-TIME: MIDDLESBROUGH 0-0 BLACKPOOL
The second-half started out in a similar fashion to the first with both sides enjoying periods of possession, but not putting too much pressure on either goal.
Just before the hour-mark Tony Mowbray was the first to make a substitution, bringing on Marvin Emnes and it seemed to spring Boro into action as they sent in a couple of teasing crossed with second centre resulting in Lukas Jutkiewicz heading well wide.
Nathan Delfouneso came on for Martinez with around a quarter of the game left for his second debut in a Blackpool shirt, filling in on the left with Bishop moving back into his favoured central position.
Both sides looked to spring counter-attacks in the latter stages and it was Blackpool who finally got themselves a goal through Basham when the ball ricocheted into his path from Ferguson's driven shot.
GOAL: Middlesbrough 0-1 BLACKPOOL
The utility man reacted quickly to stab the ball into the back of the net from eight yards with his left foot.
Middlesbrough threw all they had at Blackpool and got the equaliser in the final minute of stoppage time as Emnes placed the ball in after Blackpool failed to clear their lines fully.
GOAL: MIDDLESBROUGH 1-1 Blackpool
FULL-TIME: MIDDLESBROUGH 1-1 BLACKPOOL