Hurricane Irma could hit Caribbean by Tuesday, but US impact unclear
                                
                                
                                    (Newser) -
                                    As Texas still deals with the devastation from  Harvey , another weather system churning in the Atlantic, and moving west toward the US, has some worried.  CNN  reports on Irma, currently a Category 3 hurricane that experienced "rapid intensification" from Wednesday into Thursday, meaning its wind speed ramped up at...