English ⇄ Russian

give someone a heads-up stresses
inf.	давать знать (Irina_); предостеречь (кого-либо: ...gave him a heads-up that an investigation was pending Val_Ships); предупредить (I just wanted to give you a heads-up. I am dog sitting my parents' pitbull and my sister's mastiff for 7 days. I hope they are not going to make too much noise. – хотел тебя предупредить. • I wanted to give you a heads up that I'll be sending you the revised form for your approval. • If I see your parents' car pull in, I'll give you a heads-up. ART Vancouver); сообщить (в знач. "предупредить" Irina_); предупреждать (Irina_); дать знать (предупредить: If I see your parents' car pull in, I'll give you a heads-up. ART Vancouver)
inf., mean.2	рассказать, как продвигается дело (tell about how a situation or plan is developing: The boss called a meeting to give us a heads-up on the way the project was going. Bullfinch)

give a heads-up: 3 phrases in 2 subjects

Idiomatic	1
Informal	2