Prime Minister Benjamin Netanyahu and Defense Minister Israel Katz vowed further strikes after the series of Houthi missile attacks this week.
This is the fifth time the Yemen-based terror group has fired a missile at Israel within the past week.
The warning was sent at 9:45 a.m. on Wednesday, following a similar warning against the Houthis on Sunday, in which the IDF also did not actually attack.
"Due to the terrorist Houthi regime's use of seaports for its terrorist activities, we urge all those present at these ports to evacuate," said IDF Arabic spokesman Avichay Adraee.
The last sirens that were sounded in the Israeli capital occurred 13 hours prior, also due to a missile launch from Yemen, and the third missile that fired towards Israel in two days.
Houthi leaders began reaching out sometime around the first weekend in May to US allies in the Middle East, two US officials said.
Following the sirens, the IDF announced that the missile had been intercepted.
Operation Rough Rider, which began on March 15, during which the US military said it struck over 1,000 targets, cost $1 billion in its first month.
The Israeli public has every right to wonder whether Trump’s commitments to its nation are contingent on his personal financial interests.
IDF's Arabic spokesperson, Col. Avichay Adraee, warned locals should evacuate until further notice for their own safety.