The infrared scan will also be immensely valuable dealing with insurance adjusters because it shows the full extent of the water damage and leaves no room for guesswork. Do everything possible to dry out the attic. Rake up and discard wet loose fiberglass or cellulose insulation. Wet attic fiberglass batt insulation can be dried and re-used, according to Owens Corning. Everything else must be thrown away.
Dry heat is needed.
Turn up the furnace thermostat to 78 degrees Fahrenheit. Turn off the humidistat. Bring fans up to the attic. Connect the fans to outdoor extension cords and keep them running continuously. If water has gotten into electric receptacles, turn off the power to the outlets and drain the fixtures.