Israel on High Alert
A Syrian army source told the Iranian news agency FARS, "If Damascus comes under attack, Tel Aviv will be targeted, too."
The source added, "We are rest assured that if Syria is attacked, Israel will also be set on fire."
Iran's Supreme Leader Ayatollah Ali Khamenei also voiced his opposition to a U.S. military strike, calling it a "disaster."
"The intervention of America will be a disaster for the region," Khamenei said, according to the Iranian state news agency ISNA. "The region is like a gunpowder store and the future cannot be predicted."
Israel's cabinet has called up a limited enlistment of reserve forces and Israeli Army Radio reports Israel has reinforced its missile defenses as a precaution against possible retaliatory attacks. Israel's defensive arsenal includes the short-range Iron Dome missile interceptors, the mid-range Patriot and the long-range Arrow II.
Israeli Prime Minister Netanyahu told his nation today, "There is no reason to change daily routines," and echoed his statement from Tuesday saying, "We are prepared for any scenario."
Israeli media reported a run on gas masks and local TV stations showed video of long lines at a free gas mask distribution center in Tel Aviv.
But Israelis aren't worried yet, according to Col. Yechiel Kuperstein, the former head of the Home Front Command's Physical Protection Department.
"Israelis can't panic," Kuperstein told told ABC News. "We know how to do it, but not at the moment. I think it is too far away. The threat is too far away for the people to be in panic."
ABC News' Alyssa Newcomb and Mary Bruce contributed to this report.