The pontiff met with Christian and Muslim leaders and visited four cities during his three-day trip.
One possible contributor may have been "cloud seeding," a practice designed to increase precipitation.
The hostility between the countries has only worsened in the six months since Hamas launched its attack on Israel.
President Joe Biden said the U.S. would not be participating in any potential Israeli counterattack on Iran.
Israel had promised to retaliate for Iran's Saturday attack, in which Iran launched hundreds of drones and missiles.
In a message on X, Hirsi wrote she is a Columbia Students for Justice in Palestine member and said she was suspended from Barnard College on Thursday.
The chain says its cold drinks and the cups they're served in are surging in popularity. A redesigned cup could use as much as 20% less plastic.
