Wind-driven wildfires in Oklahoma have killed at least four people and resulted in 142 others being taken to local hospitals with fire-related injuries, the state's Department of Emergency Management said Sunday.

Wildfires in Oklahoma have left four people dead and at least 200 injured, state officials said Tuesday, and a red flag warning remains in effect. The fires were fueled by strong winds brought by a violent storm that swept across the country over the weekend.

Oklahoma is under alert for fire danger on Monday after being devastated by deadly blazes over the weekend, and amid a continued fire threat in the Plains. More than 40 million Americans are under alert for fire weather conditions over the next few days.