When you’re stranded with incorrect tire pressure, knowing how to respond prevents further damage. If pressure is critically low (TPMS light flashing), pull over immediately—driving on underinflated tires for more than 5 miles can ruin sidewalls. Use a portable air compressor (keep one in your car) to inflate to the nearest safe PSI (aim for 25-30 PSI if you don’t have the vehicle’s recommended number). For a slow leak, use tire sealant temporarily, but inflate to 10 PSI above recommended levels—sealant may slightly reduce effective pressure. If overinflated, release air slowly: press the valve stem pin with a gauge or key, checking pressure every 2-3 seconds to avoid underinflating. In extreme heat, never deflate a hot tire—wait until it cools, as pressure will drop naturally. For long waits (e.g., no compressor), call for roadside assistance instead of driving on compromised tires. Emergency handling preserves tire integrity until you can get professional help.