Over 100,000 customers in southern Louisiana were without power Sunday as "extremely dangerous" Hurricane Ida made landfall as a high-end Category 4 storm near Port Fourchon, according to power outage monitors.

Why it matters: Ida is bringing "catastrophic effects" to Louisiana with storm surges, extremely high winds and dangerous rainfall flooding.

What they're saying: Entergy Louisiana, one energy provider in the state, said in a statement Sunday that people could be without power weeks after the storm passes.

• "Every storm is unique. Based on historical restoration times, customers in the direct path of a Category 4 hurricane can experience outages up to three weeks and beyond three weeks for a Category 5 hurricane," the company said.

The big picture: At landfall, the storm's maximum sustained winds were 150 mph, which is close to Category 5 intensity, Axios' Andrew Freedman reports.

• President Biden on Friday approved Louisiana Gov. John Bel Edwards' state of emergency declaration, allowing the Federal Emergency Management Agency to coordinate all disaster relief efforts in the state.

Go deeper:Meteorologists ahead of Hurricane Ida arrival: "We can't bear to see this on satellite"