julia bagg from our sister station in miami is live now with the latest. lia, good morning. >> reporter: good morning. doctors really want to know how these two patients got sick and did it happen from mosquito bites because that would mean that mosquitos in the u.s. are now infected with the zika virus. up to now, all of the cases in the continental u.s. and hawaii, all of them have been travel acquired. that means someone went somewhere else, perhaps brfle, got sick there, came back to the u.s. they may have developed symptoms later. but they didn't contract the virus here. doctors already known that the virus -- mosquitos capable of transmitting the zika virus are in south florida but up to now they have been not been transmitting zika. that is why [ no audio ] >> we just lost julia bagg. >>> let's turn to chuck bell now. we've been keeping an eye on this forecast and trying to get people ready. warning people about the potential -- not potential. it's going to be broiling hot. >> no doubt about it and sometimes it's all about a frame of mind. so aaron a

julia bagg has the latest in miami. >> hi there, and good morning to you. the big concern here in south florida with these two miami area cases, how did these people become infected? did it happen with a mosquito bite? it also could have been a sexual transmission as well, but if it is indeed a mosquito bite, that says a lot about the mosquitos in south florida. that could mean mosquitos here are already transmitting the virus. up to now, scientists say that the mosquitos capable of trans mimting this virus have been in florida for a long time, but so far they have not been known to transmit the virus. this could be a big deal if that is indeed the case. if these are mosquito borne cases of the zika virus. the rest of the cases, more than 300 in florida have been acquired elsewhere. someone traveled to a place, a country like brazil perhaps where there is zika and returned home and become sick. the symptoms generally last 7 to 10 days and, of course, there are devastating birth defects. >> julia bagg live in miami for us. thank you. >>> summertime for kids