The federal government has chosen a military base in Oklahoma as the location for a new temporary shelter to house migrant children.
A magnitude 5.0 earthquake centered near one of the world's key oil hubs brought down building facades and shattered windows in a central Oklahoma city.
Oklahoma earthquakes: People are talking nervously about the big one as man-made earthquakes get stronger, more frequent and closer to big cities.
A storm system that spawned the twisters brought winter storm woes on Monday and amplified flooding that's blamed for more than a dozen deaths.
The EPA proposed tougher new limits on Tuesday on smokestack emissions from Texas and 22 other states that burden downwind areas with air pollution.
Study: The sharp rise in earthquakes in Oklahoma is likely due to industrial activities in the energy-rich state, such as oil and natural gas production.