If you are indoors, you should stay inside and move to the center of the building, under a strong piece of furniture like a desk or table. You should stay away from windows, glass, or anything that could fall on you. You should not use elevators. If you are outdoors, you should move to an open area, away from power lines and buildings. If you are in a vehicle, you should stop and remain inside until the shaking stops. You should not use fire sources like matches or candles due to potential gas leaks. 

1.It was hard to go outside during the heatwave last week ir

1. unless this store sells emergency kits , I'll check the other one

2. If you throw trash into the river , it will become more polluted

3. The factory is dumping waste in the lake , which is why it is polluted