Boosted by late-season heat, domestic storage concerns and robust global demand, natural gas futures on Wednesday rallied for a fifth-straight session. The October Nymex gas futures contract spiked 83.0 cents day/day and settled at $9.114/MMBtu, marking its biggest jump in the latest bull run. November gained 83.3 cents to $9.167.

At A Glance:

NGI’s Spot Gas National Avg. rose 28.0 cents to $8.155, extending its rally to three days amid a reemergence of summer warmth in the nation’s midsection.

The natural gas market has been moving “from strength to strength,” analysts at Evercore ISI said Wednesday

They noted robust demand...