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Las Vegas heat waves — when temperatures exceed 115°F for multiple consecutive days — are genuinely life-threatening events for unprepared visitors. The city's cooling infrastructure handles most weather, but extreme heat requires specific preparation.
The Threshold Rules
- 110°F: Manageable with standard precautions — water, shade, limited outdoor time
- 115°F: Dangerous without constant shade access — no more than 15 minutes in direct sun
- 118°F+: Emergency conditions — outdoor exposure should be essentially zero
The Cooling Stations
Clark County operates cooling stations during heat emergencies — typically community centers, libraries, and designated facilities with 24-hour access. The Las Vegas Convention Center lobby also provides unofficial shelter during extreme events.
The Indoor Route
During a heat wave, the casino-to-casino indoor walking route becomes essential. The connected network from Mandalay Bay to the Wynn can be navigated with as little as 2–3 minutes of outdoor exposure total, using sky bridges and casino floor connections.