If you are at home and hear an air raid siren, turn off all appliances, shut off the gas supply, and extinguish any open flames. Leave the premises quickly and go to the nearest protective structure or shelter by the shortest route. Do not use the elevator, and instead take the stairs. If there are no protective structures near the house, choose the safest place in the apartment, such as a corridor or bathroom, and stay away from windows. If you are outside when you hear the sirens, go quickly to the nearest shelter, such as an underpass, metro station, parking lot, or bomb shelter. Avoid buildings of strategic importance or critical infrastructure. To stay informed, install the Air Alert app to receive notifications of air alerts in the selected city or region of Ukraine from the civil defense system.
@TheOldGuy regarding underpasses as shelters, I believe the same to be true for war related attacks unless the structure has been doubly enforced and identified as a communal shelter as in UK during WWII.
Note - not intended as criticism, just additional information to share.
@Atticus1956 This is a statement from the government. I got it from the live feed on Telegram.
@TheOldGuy Discrepant government info...never a surprise. Too many chiefs. www.weather.gov:
Tornadoes and Overpass Safety:
In reality, an overpass may be one of the worst places to seek shelter from a tornado. Seeking shelter under an overpass puts you at greater risk of being killed or seriously injured by flying debris from the powerful tornadic winds.
@Atticus 
1956@mastodon.social
I don't think they are at all worried about tornadoes. They are worried about missiles fired by the Russians.
@TheOldGuy Born & raised in St. Louis, living in OKC. I agree with 99% of your weather related advice. Have lived through 2 major tornadoes in Oklahoma.
The 1% I disagree with is seeking shelter in an underpass. As a tornado approaches an underpass, it will create a wind tunnel effect. The result is that the wind in the underpass will be stronger than the wind above it or on the ground.