NEW : Idaho issues burning ban . More than 800 large fires are burning west of the Barry Point Fire . More acreage has burned so far than this year at this time , national fire officials say . An California fire could force more evacuations .
NEW : California issues burning ban . 70 large fires are burning west of the Mississippi River . More acreage has burned so far than last year at this time , national fire officials say . An Idaho fire could force more evacuations .