Pollution (Tornado Alley X Extra Disaster)

Description
Pollution is a bonus disaster in Tornado Alley Ultimate where the player must survive deadly pollution with a gas mask.

In order to survive Pollution, you must have a gas mask on or be in the underground shelter before the pollution air starts to intensify. An airplane will fly over the map and drop a supply crate of masks before the pollution sets in. There will always be a limited number of gas masks. The amount of gas masks is dependent on how many players are in the game.

'''Example: If there are five players in a game, there may only be three gas masks available. The other two players would not survive unless they had an underground shelter key.'''

Healing items will not assist a player as pollution becomes more lethal over time and the rate at which a player suffocates increases.

There's a rare chance that a Pollution Event can turn into a Death Smog, where only players with Shelter Key can survive. After Foreign Invasion's "Genocidal" difficulty, it's the second hardest extra disaster

Pollution
"[⚠️] There is an extra disaster forming!"

"[⚠️] We are expecting a tremendous shift in the air quality within this area."

"[⚠️] An onset of deadly pollution seems to be a legitimate threat."

"[⚠️] It is important to stay calm and listen to instructions."

"[⚠️] The only way to survive this deadly pollution is via gas mask or an underground shelter of some sort."

"[⚠️] We will be supply-dropping all gas masks we have on hand. There's a limited amount, so unfortunately not everyone can get one."

"[⚠️] An aircraft is enroute to your location. You don't have much time. Get to the supply drop as soon as possible! Good luck to you all."

"[⚠️] 30-60 seconds until pollution becomes too heavy to breathe without a mask. Get to the supply crate and get a mask!"

"[⚠️] Pollution has become too dense to breathe. Those without a gas mask or shelter access will begin to suffocate!"

"[⚠️] The air quality has begun reverting back to survivable, normal levels."

"[⚠️] The pollution has dissipated. It is safe to resume normal activities."

Death Smog
"[⚠️] There is an extra disaster forming!"

"[⚠️] This message is issued by the ROBLOXian Government & The United Nations"

"[⚠️] It appears an onset of Death Smog is about to happen."

"[⚠️] The Death Smog is able to suffocate anyone even if they have a Gas Mask"

"[⚠️] The only way to survive the Death Smog is by the underground bunker"

"[⚠️] Access to the underground bunker has been activated! Hurry!"

"[⚠️] Only 20-80 seconds remain before the world is engulfed by the Death Smog..."

"[⚠️] Finally, the Death Smog has dissipated..."

"[⚠️] May this be a reminder of how our Pollution can turn deadly anytime"

Trivia

 * Pollution and Atomic Bomb are the only bonus disasters that are not present in the Doomsday forecast.
 * Pollution functions very similarly to Planet Impact & Atomic Bomb where players have limited time to complete the objective otherwise they die.
 * The Song that plays during Pollution is "Hitman" by Kevin MacLeod, whereas in Death Smog it is "WTF" by Kevin Sherwood.