"Είναι ανάγκη."

[ct1001]

I would use "επείγουσα ανάγκη" for "emergency," and "need" for "ανάγκη." I also find the original sentence somewhat unnatural. "Υπάρχει ανάγκη" might work better.

[nauajos]

This is a very common and natural way to talk about an emergency. It's an idiom. Maybe some people also say "υπάρχει ανάγκη" but I haven't heard it. "Υπάρχει μια ανάγκη" - There's a need/necessity

[thoas]

Can this also be translated to "it is necessary" as my German-Greek dictionary and wordreference.com claim?

[robert672165]

Yeah, but this is the medical skills section. If you needed help and shouted "it is necessary", you wouldn't get it.

[Lng52-._]

Can you also say, "Είναι επείγον!"?

[GayChristo1]

what about "It is a need"?