Los Angeles County was under a state of emergency Wednesday, declared over federal immigration raids, in the latest effort to push back on President Donald Trump's hard-line policies.

The declaration, which is usually issued in times of natural disaster, frees up resources that can be used to help those affected in the county, home to a large number of undocumented migrants and one of the most diverse parts of the United States.

Supporters of the move say broad-based migrant raids being carried out by masked agents are untargeted and focused on people who speak Spanish or appear to be Hispanic.