The ability to get right back to what you were doing before is a skill.
A ‘skill’, by definition, is something you can develop.
Yes, stop and help others.
No – don’t let that stop you from helping yourself, by drifting away afterwards.
One thing I do that helps me with this is to prioritize everything I have to do tomorrow the night before.
Having done this, there is almost never a question as to what I should do first after the dust has settled.