A super-strong USD is not new news, but the Brazilian Real has been on the receiving end more than most:
Fiscal issues and also tensions between the President and the central bank governor have been amongst the factors weighing on the BRL. Short-term rates surging higher have done little to support the currency.
Speculation on an intervention by the Banco Central do Brasil (the coutnry's central bank) is heightening. If I get any more on this I'll post it.