11.  Losing two of the tankers broke the rhythm of the firefighting effort, allowing the blaze to get a better hold on the northwest flank, Smith said.

12.  Only one death has been attributed to firefighting efforts, that of a smoke-jumper from Alaska whose parachute failed to open while he was training.

13.  Polychlorinated biphenyls and other toxins spread by firefighting efforts became a nagging issue once the fire was out.

14.  Six air tankers spearheaded the firefighting effort, dropping fire-retarding chemicals to slow the advancing flames.

15.  Strong northwest winds and dry forest conditions are hindering firefighting efforts, Daniel said.

16.  That summer was the last time such emergency federal funding was available for firefighting efforts.

17.  The Arizona fires have pushed national firefighting efforts to an unusual level for June.

18.  The Arizona fires pushed national firefighting efforts to an unusual level for June.

19.  The declaration orders all state agencies to use California employees, equipment and facilities to aid local firefighting efforts.

20.  The fires have been burning for months, but fed by El Nino-driven drought, have intensified recently, overwhelming Mexican firefighting efforts.