We will keep the situation under close review and lift restrictions as soon as it is safe to do so," said a Thames Water spokesperson.
In adjacent regions, Essex & Suffolk Water has avoided issuing a ban despite seeing demand jump by 13 percent, or 56 million extra liters daily, while recording zero rainfall in July.
Water Director Kieran Ingram explained that earlier winter rainfall and upgrades to Abberton Reservoir provided temporary buffer capacity.
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"Thanks to a wet winter, our reservoirs had a good refill season, and we started the summer in a stronger position.
We’ve also continued to invest in improving resilience, including major upgrades and improvements around Abberton Reservoir in recent years to store more raw water," said Ingram.
However, the utility warned that continued peak demand may force future restrictions.
"But water resources are always influenced by the weather.
If the hot, dry conditions continue and our exceptionally high customer demand continues too, we may need to take further action to protect supplies, including considering a temporary use ban," said Ingram.
He emphasized the joint effort needed between the utility and the public to maintain regional supply stability.
"We’re all in this together, we’re continuing to invest, fixing every leak we find as quickly as possible, and every action customers take to use water wisely helps protect supplies for everyone," said Ingram.
To help conserve municipal supplies, the Royal Horticultural Society advised gardeners to collect rainwater and greywater, apply mulch, and water plants at their roots rather than leaves.
"As our climate continues to change, adapting how we manage water is essential," said Guy Barter, chief horticulturalist at the RHS.
Barter recommended visiting public gardens to evaluate drought-tolerant flora suitable for changing weather conditions.
"During a visit to our RHS Gardens you can see what plants are working well in the current conditions and our teams are on hand to offer advice and support," said Barter.
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Under the Water Industry Act 1991, individuals who repeatedly flout temporary usage restrictions face potential prosecution and fines reaching up to £1,000, though suppliers emphasize advice and warning letters before taking formal legal measures.
