Residents of the capital, Sanaa, sought shelter and got little sleep during the night, while some took to the rooftops in anger or frustration, firing automatic rifles skywards toward the roar of warplanes.
Schools, universities and government offices were all closed, along with most shops. Few cars ventured onto the mostly deserted streets.
"We haven't slept" one child screams and a second cries," said Mustafa al-Ahmadi, a father of eight who said the family seeks shelter in their basement when close explosions rock the house.
In what was likely the worst night yet for Sanaa, aircraft late last night and early today repeatedly bombed a weapons depot in the southern Faj Atten neighborhood, sending an eruption of fire into the air and shaking windows for kilometers (miles) around.
Officials from all sides said strikes hit the city's so-called "security belt" of army camps surrounding the capital, some of which stored ballistic missiles.
"We ran to the shop to take shelter after 1 a.M. Because of airstrikes on the mountain," said Abdel-Rahman al-Hamidi, who lives near a rebel camp that was returning fire at warplanes. Many other shops are locked up with heavy metal chains.
The campaign by the Saudi-led coalition, made up mainly of Sunni Arab states, aims to weaken the Iranian-allied Houthis, who have overrun much of the country with the help of Saleh's loyalists and forced Yemen's current president, Abed Rabbo Mansour Hadi, to flee abroad.
The overall figures are likely much higher and it was not immediately clear if the casualties cited by Geneva referred to just airstrikes or the strikes and fighting between Yemen's warring factions.
The Saudi-led coalition says rebels have set up positions near civilians but that it is doing its best to avoid civilian casualties.
