Fire

Make a new image, this time we will be using Grayscale mode. Use width:300 pixels and height:200 pixels. Look at picture below:

Fill the image with black, so your image will be all black now. Look at your channels, you only have 1 channel called "Black". Now create a new channel, the new channel will be called "Alpha 1".

Use the type tool

to type some letters:

Now click on the "black" channel.

From the channels, go to layers...

>>>>>>>

Then fill the selections with white. You will have some white letters now. After that go to Select>Deselect

Rotate the letters now, go to Image>Rotate Canvas>90º CW.

Go to Filter>Stylize>Wind, use the following setings: Method: Blast Direction: From the right Rotate back the image, Image>Rotate Canvas>90° CCW

your image should looks like this

Now go to Filter>Stylize>Diffuse, select Normal mode. Then go to Filter>Blur>Gaussian Blur, use Radius: 1 pixels, now the words are blur.

To add fire colors, we go to Image>Mode>Indexed Color, then second  go to Image>Mode>Color Table. Select BlackBody

Click OK then you're DONE!