A simple system can be built to alert relatives by SMS if a fire occurs on your property using Twilio Programmable SMS and Raspberry Pi. The system consists of an IR flame sensor module that detects infrared light wavelengths emitted from a fire's flame, sending a signal to a Raspberry Pi, which then sends an SMS alert with Twilio Programmable SMS. To build the system, you'll need a Raspberry Pi, an IR flame sensor module, jumper wires, and a Twilio account. The Python script intercepts the signal from the sensor and sends an SMS alert to relatives. The system can be customized by changing variables such as phone numbers and environment variables. Testing the system involves lighting a lighter near the sensor to detect flames and sending an SMS notification to relatives.