Automatic Fire Detection and Alert System Ala Rohika Reddy 1 , M Vara Raghava Sai 2 , Jollu Vamsi 3 , C.S.K Raju 4 1, 2 Computer Science Department, GITAM Deemed to be University, Bengaluru-561203, India 3 Electronics and communication Department, GITAM Deemed to be University, Bengaluru-561203, India. 4 Department of Mathematics, GITAM Deemed to be University, Bengaluru-561203, India 1 rohikabhavana@gmail.com, 2 mvrsvara@gmail.com, 3 vamsijmk@gmail.com, 4 sivaphd90works@gmail.com Abstract: Fire detection systems are the most critical element of any building design these days. In recent days, fire incidents are commonly reported. This might be due to the negligence of people in many cases. Consider a few examples, in places like fuel filling stations, crackers shops, houses, and mainly in workplaces, etc. There are nearly thousands of fire accidents reported in a year. By taking all these into consideration, in this paper, an automatic fire detection using a fire sensor is introduced. The existing fire detection system detects the fire by using a fire sensor, but our proposed system is different from that. The existing systems are with fire alarms and alerts by raising alarm when the fire is detected within a limited space. The proposed system contains the fire alarm, in addition to that it sends a notification to our mobile and mail can be sent to the attached mail id which will be having the information of the accident-prone area, and also the information needed to alert the fire station about the incident. This implemented fire detection system will be more efficient and provide more safety when compared to the conventional fire alarm systems available. Keywords: NodeMCU, Fire sensor, Buzzer, Blynk app, Alarmed, Fire accident, Fire detection, Arduino IDE. 1. Introduction: Fire detection systems are the most critical element of any building design these days. For high- rise buildings and multi-winged structures such as hotels and hospitals, these designs can become complex and it is mandatory to have it installed well in advance. Fire detection systems are designed to discover fire incidents early in their development itself. This would help in the safe evacuation of occupants, when time will still be available. Early detection of fire also plays a significant role in safety and alerting the emergency response personnel. By doing so, life loss and property loss can be reduced, and the time taken for the emergency response