OKLAHOMA CITY (AP) — Forecasters warned of dangerous, life-threatening wildfire conditions in parts of the Southwest and Southern Plains on Tuesday, as a forestry official warned firefighters battling a terrifying deadly blaze in Oklahoma that it would be a "historically critical day."

Gusty winds and low humidity in drought-stricken areas will create dangerous fire conditions in parts of Colorado, Kansas, New Mexico, Oklahoma and Texas, according to the Storm Prediction Center in Norman, Oklahoma. National Weather Service meteorologist Doug Speheger said such conditions haven't been seen in a...