Overcommunicate. The most dangerous five words in the business vocabulary are “Did you get my email?” It presumes that the other person is fully responsible for receiving the information that you’re trying to impart, and that by sending an email (or text) you’re absolved from any further responsibility.
Walk down the hall. Pick up the phone. Book time on the other person’s calendar. Be utterly paranoid that someone might not have heard what you’re trying to tell them. Be sure you’ve been heard. That’s your job. Not theirs.