Here's a picture showing the available viewing ratings for Emmerdale from June 1st to August 28th.
The average trend is upwards, as seen in the straight line across the graph, so Emmerdale is gradually getting more regular viewers.
Summer Fate caused a temporary big peak for Monday August 3rd - Friday 7th 2015, but after Monday 10th (6.22m), ratings dropped down towards 5.59m by Friday 14th. Tuesday August 25th was 5.66m overnight for when James and Pete looked for Ross in the woods and Ross was seen in hospital at the end of the episode. Compared to Friday 24th July (5.36m), Emmerdale seems to have gained about 0.3m new regular viewers by August 25th.
Emmerdale viewer ratings were 5.76-6.53m for Summer Fate week 3-7/8/15.
Coronation Street viewer ratings were 6.37-7.04m for Summer Fate week.
EastEnders viewer ratings were 5.16-7.06m for Summer Fate week.
Hollyoaks viewer ratings were 0.86-1.08m (1.08m for Wednesday 5/8/15 at 6.30pm) for Summer Fate week.
The Great British Bake Off (BBC1) on Wednesday 5/8/15 at 8pm had 11.62m.
For comparison, here are pictures for EastEnders and Coronation Street for recent viewing ratings.