Material Design does not distinguish between error and warnings. Why?

As per

Material Design - Errors pattern there is only one color for displaying errors and warnings.

Their buttons have either Primary, Accent, Default or Warn color.

In this case Warn is Error. However coming from Bootstrap and other UI libraries world Warn is Orange and Error is Red.

I am wondering if there was any reason wht Material design dropped the Warn for Error.

Material Design does not distinguish between error and warnings. Why?

As per

Material Design - Errors pattern there is only one color for displaying errors and warnings.

Their buttons have either Primary, Accent, Default or Warn color.

In this case Warn is Error. However coming from Bootstrap and other UI libraries world Warn is Orange and Error is Red.

I am wondering if there was any reason wht Material design dropped the Warn for Error.