The Sahel region of Nigeria faces significant climate variability, impacting human security through increased droughts and food insecurity. A mixed-method survey approach was employed to gather data from community members in selected villages across the region. Survey results indicate a strong correlation between declining rainfall patterns and increased malnutrition rates among children (50% observed decline). Climate change significantly undermines human security by exacerbating food shortages, water scarcity, and health issues. Addressing these vulnerabilities requires immediate policy interventions. Policy makers should prioritise climate-resilient agricultural practices, enhance access to clean drinking water, and improve healthcare services in vulnerable communities.