Are flights being delayed due to a heatwave?

economictimes.indiatimes.com:

Inconvenience to passengers:

Last summer, a flight that was scheduled to take off from the Newark International Airport was left on the tarmac and passengers inside the aircraft suffered for seven hours before the flight took off, all in extreme summer conditions with high temperatures. The authorities also investigated another incident from Las Vegas which was a Delta aircraft which had left several passengers on a hot airplane for several hours.

Reasons for the delay:
Many aircrafts which have been manufactured by Boeing and Airbus can take off safely with heat up to 122 degrees. There are some other issues. During a take-off, there are several factors including temperature, air pressure, precipitation, wind velocity that are considered by the pilot. If either of these factors face extreme levels, the flight take off and its ascent also known as the climb performance are impacted.
There is also the issue of air density. Hot air is thin air as the molecules spread out. This reduces the lift on which flights take off. This impact is felt on the engine thrust making take off’s difficult.
Solutions:
One solution which may not be agreeable to many travellers is making take off in a short run way by reducing the weight of the aircraft. This would mean reducing the check-in baggage limits and possibly off-loading passengers in some cases. Finally, it is advisable to book flight tickets which offers an opportunity to travel early morning and late nights. They