What to do about a frozen fuel line - 1994 Toyota Camry

Do you have ethanol gas in your area? If so, ethanol is around 10% alcohol. So you'd have far more alcohol than you could possibly get with 2 bottles of heat. Doubtful your fuel lines are frozen. Are you just guessing or have you tested fuel pressure and volume

You will most likely have no fuel supply. Today's gasoline contains additives in the fuel that help prevent the fuel from freezing. Unless you are constantly running your fuel tank very low ( moisture collects in the tank ) and driving in deep snow in a very cold climate, it would be unlikely the gas will be frozen

FAILURENTO PROPERLY RELEASE FUEL PRESSURE CAN LEAVE AN AIR VACCUUM IN FUEL LINE. -6 DEGREES COULD BE WATER FROZEN IN FUEL LINES

The fuel line runs from the gas tank (underneath) the car up to the injection rail on the engine. Since most of the fuel line is inaccessible, trying to thaw it with a hair dryer is not a good option. You could try blowing the hair dryer on the fuel filter. A better option is to get a couple bottles of HEET at your local auto parts store. Put this in the gas tank. If the fuel line is completely frozen, HEET is not likely to work. You will need to bring the vehicle inside a warm shop. If the problem is water in the fuel, HEET will prevent it from freezing in the future. A gas line will not freeze, unless there is contamination in the fuel. A fuel filter change is a must in this situation, and may solve the problem.
How to change fuel filter pics 2001 sedan Taurus Car Club of America Ford...

It could be water frozen in your fuel system (fuel line, fuel filter, fuel pump or pickup or fuel rail). If you can get the car into a garage try letting it warm up, otherwise wait for a warmer day, to try starting it. If it is water in the fuel, you can add "dry gas" to your fuel which is an alcohol product designed to be an antifreeze and to absorb the water. However, if the water is already frozen in your system, this won't help without warming the car up first in some way. If you haven't changed your fuel filter in the last year, I would do that as well. Water can easily build up in a filter and freeze there in extremely cold weather. If this problem is water related, also fill the tank completely with a fresh quality gasoline, and add dry gas for the next several fill ups to help get any water in your fuel system out to keep it from happening again.

Frozen fuel or maybe oil is too thick. What Weight oil was put in at last oil change?

I'm assuming you got this fixed already but to prevent it from happening again keep fuel more than half tank and with every fill add a fuel additive that prevents freezing

If it is frozen, adding Heet will no thaw it. It has to mix with the fuel first to prevent freezing. Pretty unusual for water to be in gas but it could be possible. Don't over look other fuel situations, i.e. fuel filter, fuel pump etc.

its never to late to add heetand you definitley want to catch it before the fuel lines split, and adding some more gas will help too

The fuel line should run under your vehicle along the frame on the drivers side.