Celia Barquin Arozamen's body was found in a body of water near a golf bag at a course not far from Iowa State University on Monday.
"Even though the heavy rains have ended, the flood hazard to life and property is real," city officials said.
Chen is married to former CBS CEO Leslie Moonves, who recently left the company amid allegations of sexual misconduct.
Democratic U.S. Sens. Elizabeth Warren and Edward Markey sent the letter Monday seeking answers about the explosions from the heads of Columbia Gas.
China will start imposing tariffs on over 5,000 American products, including coffee, honey, industrial chemicals and farm machinery.