Currently BIP 91 got 81.9% support, also some major pools will start signaling tomorrow.
It means that there won't be a significant split on 1st of August, and BTC (and as result alts as well) should recover from here.
The software that allows for SegWit2x (BIP 91) should be available this Friday and if it is adopted it will implement SegWit, then over the next six months will increase the block size from 1 MB to 2 MBs per block.
Here's the detailed flow chart:
UPDATE: Bitcoin.com and Slush just switched signalling back to BU, and BIP 91 lost about 5% support.
