Will We Get Fried in July?

Taken From arXiv

The blue dots are the points in the radio part of the spectrum that the super massive black hole in the center of the Milky Way (SgrA*) sends us normally. The red areas are what is expected by Narayan et al., in the middle of 2013, because of a gas cloud falling to the black hole.

Will we get microwaved?

I don't think so; but the authors are expecting that somebody will be able to measure this increase by factors of ten or more, over normal radiation, next year.