The exercise was originally scheduled to take place three weeks ago but was postponed due to tension with Syria. The simulation, which is being run in conjunction with the emergency response services, starts Sunday morning as Prime Minister Benjamin Netanyahu announces a week of national emergency preparedness.

Head of the Home Front Command Maj. Gen. Eyal Eisenberg said Tuesday that the outbreak of a war in which Israel would be hit with a “large volume of rocket fire” was a certainty. “Our opponents hold long-range missiles with large warheads and a carrying capacity of hundreds of pounds,” he said.

The drill will include preparation for possible missile strikes against Israel, particularly in the greater Tel Aviv area. The first few days will center on protecting civilian populations at public institutions and private households. Two alarms will be sounded on Monday, at 12:30 p.m. and 7:05 p.m., and citizens will be requested to go to protected rooms or bomb shelters and to stay inside for 10 minutes.

The drill will mark the first time an entire network of early warning systems will be tested. In addition to sirens, civilians are to receive alerts from various sources, including from from cellphones, social networks, and the television.