The engines that drive Las Vegas were humming once again this spring as casinos raked in record levels of gaming win, but another surge in COVID-19 infections amid stalled vaccination rates threatens to upend the city’s momentum.

Elected officials in tourism-dependent Las Vegas worried Tuesday about public health and the economic effects of a spike COVID-19 cases — particularly the highly contagious delta variant.

The start of summer has brought new uncertainties for the tourist mecca, however, with COVID cases resurging at among the highest levels in the country and new local government recommendations and mandates issued relating to masking.

With the eyes of the tourism world watching, Las Vegas, which launched its post-pandemic era with great fanfare earlier this summer, will once again require workers to mask up while indoors, though regulations, for now, spare visitors.

Elected officials in Las Vegas decided Tuesday not to impose a full mask mandate for everyone strolling the Strip and gathering in crowded spaces and indoors as coronavirus cases climb.

Elected officials in tourism-dependent Las Vegas worried Tuesday about public health and the economic effects of a spike COVID-19 cases — particularly the highly contagious delta variant.

With most of the COVID-19 restrictions lifted, people are flocking back to Las Vegas casinos and gambling at a record pace.

Cue the Jaws theme and the voiceover. Just when you thought it was safe to go back in the water, the threat returns.