Wildfire Mitigation Assistance Act This bill amends the Robert T. Stafford Disaster Relief and Emergency Assistance Act to authorize the President, whether or not a major disaster is declared, to provide hazard mitigation assistance in any area or related area affected by a fire for which fire management assistance was provided under such Act. The President may establish a minimum amount of hazard mitigation assistance to be provided for a wildfire or fire complex. The Federal Emergency Management Agency (FEMA) shall submit an annual report on projects carried out, and funding provided, pursuant to this bill.