A growing ice storm has spread across a large section of Oklahoma, knocking out electrical service to hundreds of people and making roads hazardous.
The National Weather Service posted ice storm and winter storm warnings Monday for parts of Oklahoma as well as sections of Texas, Arkansas, Missouri, Kentucky and southern slices of Indiana and Illinois.
The weather service said up to an inch of ice was possible in places.
At least one traffic death was blamed on icy roads in Oklahoma.
Oklahoma Gov. Brad Henry declared a state of emergency for all 77 of the state's counties, paving the way for seeking federal assistance for ice storm damage.
Oklahoma utilities said more than 1,200 customers were blacked out by the ice and numerous schools closed.