Hot yoga isn't necessarily dangerous, but because this is a strenuous form of physical activity that takes place in a very hot room, it can be potentially dangerous if it isn't practiced carefully. The heat in a hot yoga room, which is typically between 90 and 100 degrees, or even higher, leaves practitioners at risk for heat exhaustion, though individuals who keep themselves hydrated and respect their limits can avoid this.
There isn't a lot of scientific evidence or consensus to support or refute claims that hot yoga is either inherently dangerous or more beneficial for weight loss than other kinds of yoga. Hot yoga practitioners are exposed to an increased risk of muscle strains and other injuries due to the hot environment in which they practice, but this doesn't mean that every hot yoga practitioner will experience this, according to The New York Times.
Essentially, while hot yoga poses more risks than traditional yoga practice, it can be done safely. Practitioners who are committed to hot yoga will need to be conscious of any muscle pain or strain that they feel during their practice, and they should also be sure to stay hydrated and watch for signs of heat exhaustion, which include dizziness, faintness, headache, nausea, and skin that is cool to the touch in spite of a hot atmosphere, .