So, to clarify, we have:
First Birds Fall, Now 100,000 Fish Dead in Arkansas
http://www.aolnews.com/2011/01/03/first-birds-fall-now-100-000-fish-dead-in-arkansas/?icid=main%7Chp-desktop%7Cdl1%7Csec1_lnk1%7C193294
Woman reports dozens of dead birds in her yard (Kentucky)
http://www.wpsdlocal6.com/news/local/Woman-reports-dozens-of-dead-birds-in-her-yard-112830524.html
Tons Of Dead Fish Wash Ashore In Brazil
http://translate.google.com/translate?js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&sl=auto&tl=en&u=http%3A%2F%2Fwww.parana-online.com.br%2Feditoria%2Fcidades%2Fnews%2F502434%2F%3Fnoticia%3DMORTANDADE%2BMISTERIOSA%2BDE%2BPEIXES%2BNO%2BLITORAL&act=url
We know, for certain that it is NOT the fireworks. . .