According to Wikipedia:
“Climate models suggest that the ignition of 100 firestorms, each comparable in intensity to that observed in Hiroshima in 1945, could produce a “small” nuclear winter…the cumulative products of 100 of these firestorms could cool the global climate by approximately 1 °C (1.8 °F), largely eliminating the magnitude of anthropogenic global warming for two to three years.”
So yeah, I’d say probably not.