Intel CPUs have thermal safety features, so they will not burn up even under abnormal conditions or loss of cooling power. They start to throttle back at 105C and if the temperature hits 125C the CPU may force the computer to shut down.
Approaching 105C may indicate a problem with the cooling system, but the only thing that will happen as a result is that it may be slower under full load. Up to even 100C is considered normal though.