Yellow alert issued for Mumbai and nearby districts.
Temperatures may be 4‑5 degrees hotter than normal.
Stay cool: drink water, use fans, avoid being out in the sun for too long.
Scientists watch the heat because it can affect crops and food prices.
A yellow alert means the temperature could be about 38 degrees and the air will be very humid.
The hot weather started after the monsoon rains stopped, so the air became drier.
Experts say people should drink plenty of water, stay in cool places, and watch for any health warnings.
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