According to the procedure, at this point in time they have to decide whether to send a cement plug down into the well. They are stuck with their fingers (mud) in the dike right now. If a storm forces them off, gonna be trouble. They cannot cap and leave, since the stack appears to be leaking mud.
>>If a storm forces them off, gonna be trouble.
Just from a quick look, the meteorology looks to be on their/our side, at least for the next several days.