I have a 1999 civic EX and today while going to work I was stuck in traffic for a long time due to a snowstorm. After a while my car started smoking crazy. The smoke was coming out from under the hood and from the vents. The interior looked like a hotbox and it was hard to see the road ahead. I quickly pulled into a parking and turned the engine off. WhenI opened the engine bay I could see that there was coolant on the head cover and on the radiator fan. I could hear the coolant boiling. Can someone please help out? Also, the heat gage was not showing a hot motor, it was at a normal height.
Sounds like your radiator cap has gone bad and needs to be replaced. The cap has a rubber seal, which is prone to cracking in severe cold. Coolant will only boil and turn to steam if the pressurized system has been compromised, so you're losing pressure somewhere. And since you said Coolant was all over the fan and Valve covers my first guess would be the cap. Take it off and inspect it. If it's not the cap, then there may be a crack along the top of the radiator itself.
NOTE: Your car is 20 years old (high five) so it's earned the right to have a few part failures :)