* President says restrictions to run from July 3-20
* Measures to tighten movement curbs, shut non-essential offices
* Health experts warn risk of devastating India-type wave of cases
* Restrictions will be evaluated in three weeks, could be extended
* Additional vaccines to arrive, including from Moderna (Updates with record infections, comment from ministers)
By Stanley Widianto and Kate Lamb
JAKARTA, July 1 (Reuters) - President Joko Widodo said on Thursday that Indonesia will impose emergency measures until July 20 to contain an exponential spike in coronavirus cases that has strained the medical system.
There has been an alarming climb in virus cases in the world's fourth most populous country in recent weeks, prompting warnings from health experts the outbreak could be as bad as India's devastating second wave if tighter measures are not introduced.
"With cooperation from all of us and the grace of God, I'm certain that we can suppress COVID-19 transmission and restore people's lives quickly," said the president, who is known as Jokowi, as he announced the stricter measures.
The measures, from Saturday, aim to halve the number of daily virus cases to fewer than 10,000, and include tighter restrictions on movement and air travel, a ban on restaurant dining and the closure of non-essential offices.
They will be applied on the most populous island of Java and the holiday island of Bali.
Grappling with the worst outbreak in Southeast Asia, Indonesia has reported record daily COVID-19 cases on seven of the past 11 days, including on Thursday, with 24,836 new infections and 504 deaths, both new highs.
Indonesia has recorded about 2.2 million cases overall and 58,995 deaths.
Health minister Budi Gunadi Sadikin pledged to boost testing and said Australia was donating A$77 million ($57.7 million) to help buy vaccines and more would arrive soon, including four million shots of the Moderna Inc vaccine.
Indonesia, which has relied mostly on China's Sinovac vaccine, aims to inoculate 181.5 million people by January but has only reached about 7.5% of that target.
DIRE SITUATION
Jokowi had long been reluctant to bring in measures that might hit the economy and news of the curbs pared gains on Indonesia's main stock index.
The Indonesian chamber of commerce, Kadin, said while the curbs were needed they were coming just as an economic recovery was gaining traction.
The highly transmissible Delta variant that caused a spike in cases in India in April and May, overwhelming healthcare facilities and swamping crematoriums, is spreading in Indonesia.