West Midlands Ambulance Service says it has been at full stretch dealing with emergency calls during the heatwave.
Now it's asking people to think before they dial 999. It says its ability to protect the most seriously ill and injured may end up being compromised.
it's asking everyone to consider whether they really need an ambulance.
On Friday and saturday the service dealt with approximately 2,500 incidents.
Percentage increase on last year:
Birmingham (Friday) 23% (Saturday) 11.7%
Black Country (Friday) 17.2% (Saturday) 28.6%
Coventry & Warks (Friday) 16.1% (Saturday) 10.4%
Staffordshire (Friday) 15.1% (Saturday) 11%
West Mercia (Friday) 20.4% (Saturday) 31.3%
But the service’s single busiest hour was between 8pm and 9pm on Sunday 27th May when it received 213 emergency ‘999’ calls - busier than an average hour on New Year’s Eve.
The main cause of the increase was chest pains and breathing difficulties but there was also an increase in inappropriate calls, it says, including alcohol-related incidents of assault and irresponsible behaviour.