More than 20,000 Louisiana residents have been rescued from their homes, and 12,000 are currently in shelters in the wake of historic, devastating flash flooding that led President Obama on Sunday evening to declare a federal emergency in the state, authorities said. At least 6 people have died in the disaster.

Gov. John Bel Edwards said 40,000 businesses and homes are without power, and rescue workers are still “bringing people out of homes to safety,” particularly in the hardest-hit areas around Baton Rouge. More than 500 pets have also been rescued, according to authorities.

Curfews for several areas in the state were issued again overnight Sunday, as emergency crews try to get a grasp on the situation, said ABC News meteorologist Dan Manzo.